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Finding the Fourth Proportional to 22,142.20, 30,555.48 and 12,070.48

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Solution

The fourth proportional to 22,142.20, 30,555.48 and 12,070.48 is: 16,656.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,142.20 : 30,555.48 = 12,070.48 : x
  2. Step 2: Convert to fraction form
    22,142.20/30,555.48 = 12,070.48/x
  3. Step 3: Cross multiply
    22,142.20x = 30,555.48 × 12,070.48
  4. Step 4: Simplify right side
    22,142.20x = 368,819,310.23
  5. Step 5: Solve for x
    x = 368,819,310.23/22,142.20
  6. Step 6: Final answer
    x = 16,656.85

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Half scale
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Double scale
Find fourth proportional to 22,143.20, 30,556.86 and 12,071.48
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.