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Finding the Fourth Proportional to 15,998.40, 22,420.80 and 15,998.40

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Solution

The fourth proportional to 15,998.40, 22,420.80 and 15,998.40 is: 22,420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,998.40 : 22,420.80 = 15,998.40 : x
  2. Step 2: Convert to fraction form
    15,998.40/22,420.80 = 15,998.40/x
  3. Step 3: Cross multiply
    15,998.40x = 22,420.80 × 15,998.40
  4. Step 4: Simplify right side
    15,998.40x = 358,696,926.72
  5. Step 5: Solve for x
    x = 358,696,926.72/15,998.40
  6. Step 6: Final answer
    x = 22,420.80

Related Problems

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Half scale
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Double scale
Find fourth proportional to 15,999.40, 22,422.20 and 15,999.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.