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Finding the Fourth Proportional to 15,102.68, 20,841.08 and 8,388.60

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Solution

The fourth proportional to 15,102.68, 20,841.08 and 8,388.60 is: 11,575.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.68 : 20,841.08 = 8,388.60 : x
  2. Step 2: Convert to fraction form
    15,102.68/20,841.08 = 8,388.60/x
  3. Step 3: Cross multiply
    15,102.68x = 20,841.08 × 8,388.60
  4. Step 4: Simplify right side
    15,102.68x = 174,827,483.69
  5. Step 5: Solve for x
    x = 174,827,483.69/15,102.68
  6. Step 6: Final answer
    x = 11,575.92

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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.