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Finding the Fourth Proportional to 31,813.32, 47,719.92 and 8,437.92

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Solution

The fourth proportional to 31,813.32, 47,719.92 and 8,437.92 is: 12,656.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,813.32 : 47,719.92 = 8,437.92 : x
  2. Step 2: Convert to fraction form
    31,813.32/47,719.92 = 8,437.92/x
  3. Step 3: Cross multiply
    31,813.32x = 47,719.92 × 8,437.92
  4. Step 4: Simplify right side
    31,813.32x = 402,656,867.37
  5. Step 5: Solve for x
    x = 402,656,867.37/31,813.32
  6. Step 6: Final answer
    x = 12,656.86

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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.