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Finding the Fourth Proportional to 8,718.78, 13,073.88 and 4,338.72

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Solution

The fourth proportional to 8,718.78, 13,073.88 and 4,338.72 is: 6,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.78 : 13,073.88 = 4,338.72 : x
  2. Step 2: Convert to fraction form
    8,718.78/13,073.88 = 4,338.72/x
  3. Step 3: Cross multiply
    8,718.78x = 13,073.88 × 4,338.72
  4. Step 4: Simplify right side
    8,718.78x = 56,723,904.63
  5. Step 5: Solve for x
    x = 56,723,904.63/8,718.78
  6. Step 6: Final answer
    x = 6,505.95

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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.