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Finding the Fourth Proportional to 18,712.59, 28,073.49 and 5,564.89

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Solution

The fourth proportional to 18,712.59, 28,073.49 and 5,564.89 is: 8,348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.59 : 28,073.49 = 5,564.89 : x
  2. Step 2: Convert to fraction form
    18,712.59/28,073.49 = 5,564.89/x
  3. Step 3: Cross multiply
    18,712.59x = 28,073.49 × 5,564.89
  4. Step 4: Simplify right side
    18,712.59x = 156,225,883.77
  5. Step 5: Solve for x
    x = 156,225,883.77/18,712.59
  6. Step 6: Final answer
    x = 8,348.70

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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.