Home / 31,854.78-47,782.68-12,134.46

Finding the Fourth Proportional to 31,854.78, 47,782.68 and 12,134.46

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Solution

The fourth proportional to 31,854.78, 47,782.68 and 12,134.46 is: 18,201.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,854.78 : 47,782.68 = 12,134.46 : x
  2. Step 2: Convert to fraction form
    31,854.78/47,782.68 = 12,134.46/x
  3. Step 3: Cross multiply
    31,854.78x = 47,782.68 × 12,134.46
  4. Step 4: Simplify right side
    31,854.78x = 579,817,019.15
  5. Step 5: Solve for x
    x = 579,817,019.15/31,854.78
  6. Step 6: Final answer
    x = 18,201.88

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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.