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Finding the Fourth Proportional to 28,617.46, 42,928.09 and 9,899.30

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Solution

The fourth proportional to 28,617.46, 42,928.09 and 9,899.30 is: 14,849.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.46 : 42,928.09 = 9,899.30 : x
  2. Step 2: Convert to fraction form
    28,617.46/42,928.09 = 9,899.30/x
  3. Step 3: Cross multiply
    28,617.46x = 42,928.09 × 9,899.30
  4. Step 4: Simplify right side
    28,617.46x = 424,958,123.91
  5. Step 5: Solve for x
    x = 424,958,123.91/28,617.46
  6. Step 6: Final answer
    x = 14,849.61

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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.