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Finding the Fourth Proportional to 12,569.64, 18,854.28 and 4,247.88

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Solution

The fourth proportional to 12,569.64, 18,854.28 and 4,247.88 is: 6,371.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,569.64 : 18,854.28 = 4,247.88 : x
  2. Step 2: Convert to fraction form
    12,569.64/18,854.28 = 4,247.88/x
  3. Step 3: Cross multiply
    12,569.64x = 18,854.28 × 4,247.88
  4. Step 4: Simplify right side
    12,569.64x = 80,090,718.93
  5. Step 5: Solve for x
    x = 80,090,718.93/12,569.64
  6. Step 6: Final answer
    x = 6,371.76

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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.