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Finding the Fourth Proportional to 8,738.78, 12,071.05 and 6,474.71

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Solution

The fourth proportional to 8,738.78, 12,071.05 and 6,474.71 is: 8,943.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,738.78 : 12,071.05 = 6,474.71 : x
  2. Step 2: Convert to fraction form
    8,738.78/12,071.05 = 6,474.71/x
  3. Step 3: Cross multiply
    8,738.78x = 12,071.05 × 6,474.71
  4. Step 4: Simplify right side
    8,738.78x = 78,156,562.14
  5. Step 5: Solve for x
    x = 78,156,562.14/8,738.78
  6. Step 6: Final answer
    x = 8,943.65

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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.