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Finding the Fourth Proportional to 8,747.76, 12,068.88 and 5,605.68

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Solution

The fourth proportional to 8,747.76, 12,068.88 and 5,605.68 is: 7,733.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,747.76 : 12,068.88 = 5,605.68 : x
  2. Step 2: Convert to fraction form
    8,747.76/12,068.88 = 5,605.68/x
  3. Step 3: Cross multiply
    8,747.76x = 12,068.88 × 5,605.68
  4. Step 4: Simplify right side
    8,747.76x = 67,654,279.24
  5. Step 5: Solve for x
    x = 67,654,279.24/8,747.76
  6. Step 6: Final answer
    x = 7,733.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.