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Finding the Fourth Proportional to 15,155.78, 20,928.20 and 9,500.24

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Solution

The fourth proportional to 15,155.78, 20,928.20 and 9,500.24 is: 13,118.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.78 : 20,928.20 = 9,500.24 : x
  2. Step 2: Convert to fraction form
    15,155.78/20,928.20 = 9,500.24/x
  3. Step 3: Cross multiply
    15,155.78x = 20,928.20 × 9,500.24
  4. Step 4: Simplify right side
    15,155.78x = 198,822,927.59
  5. Step 5: Solve for x
    x = 198,822,927.59/15,155.78
  6. Step 6: Final answer
    x = 13,118.62

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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.