Home / 31,890.55-47,836.41-13,876.96

Finding the Fourth Proportional to 31,890.55, 47,836.41 and 13,876.96

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Solution

The fourth proportional to 31,890.55, 47,836.41 and 13,876.96 is: 20,815.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,890.55 : 47,836.41 = 13,876.96 : x
  2. Step 2: Convert to fraction form
    31,890.55/47,836.41 = 13,876.96/x
  3. Step 3: Cross multiply
    31,890.55x = 47,836.41 × 13,876.96
  4. Step 4: Simplify right side
    31,890.55x = 663,823,948.11
  5. Step 5: Solve for x
    x = 663,823,948.11/31,890.55
  6. Step 6: Final answer
    x = 20,815.69

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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.