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Finding the Fourth Proportional to 28,419.76, 42,606.50 and 10,640.44

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Solution

The fourth proportional to 28,419.76, 42,606.50 and 10,640.44 is: 15,951.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419.76 : 42,606.50 = 10,640.44 : x
  2. Step 2: Convert to fraction form
    28,419.76/42,606.50 = 10,640.44/x
  3. Step 3: Cross multiply
    28,419.76x = 42,606.50 × 10,640.44
  4. Step 4: Simplify right side
    28,419.76x = 453,351,839.46
  5. Step 5: Solve for x
    x = 453,351,839.46/28,419.76
  6. Step 6: Final answer
    x = 15,951.99

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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.