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Finding the Fourth Proportional to 28,491.18, 42,732.18 and 9,770.46

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Solution

The fourth proportional to 28,491.18, 42,732.18 and 9,770.46 is: 14,654.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.18 : 42,732.18 = 9,770.46 : x
  2. Step 2: Convert to fraction form
    28,491.18/42,732.18 = 9,770.46/x
  3. Step 3: Cross multiply
    28,491.18x = 42,732.18 × 9,770.46
  4. Step 4: Simplify right side
    28,491.18x = 417,513,055.40
  5. Step 5: Solve for x
    x = 417,513,055.40/28,491.18
  6. Step 6: Final answer
    x = 14,654.12

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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.