Home / 31,864.32-47,789.12-12,135.68

Finding the Fourth Proportional to 31,864.32, 47,789.12 and 12,135.68

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Solution

The fourth proportional to 31,864.32, 47,789.12 and 12,135.68 is: 18,200.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,864.32 : 47,789.12 = 12,135.68 : x
  2. Step 2: Convert to fraction form
    31,864.32/47,789.12 = 12,135.68/x
  3. Step 3: Cross multiply
    31,864.32x = 47,789.12 × 12,135.68
  4. Step 4: Simplify right side
    31,864.32x = 579,953,467.80
  5. Step 5: Solve for x
    x = 579,953,467.80/31,864.32
  6. Step 6: Final answer
    x = 18,200.72

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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.