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Finding the Fourth Proportional to 18,969.92, 28,454.88 and 7,276.76

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Solution

The fourth proportional to 18,969.92, 28,454.88 and 7,276.76 is: 10,915.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.92 : 28,454.88 = 7,276.76 : x
  2. Step 2: Convert to fraction form
    18,969.92/28,454.88 = 7,276.76/x
  3. Step 3: Cross multiply
    18,969.92x = 28,454.88 × 7,276.76
  4. Step 4: Simplify right side
    18,969.92x = 207,059,332.59
  5. Step 5: Solve for x
    x = 207,059,332.59/18,969.92
  6. Step 6: Final answer
    x = 10,915.14

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.