Home / 31,638.58-47,446.70-13,877.87

Finding the Fourth Proportional to 31,638.58, 47,446.70 and 13,877.87

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Solution

The fourth proportional to 31,638.58, 47,446.70 and 13,877.87 is: 20,811.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,638.58 : 47,446.70 = 13,877.87 : x
  2. Step 2: Convert to fraction form
    31,638.58/47,446.70 = 13,877.87/x
  3. Step 3: Cross multiply
    31,638.58x = 47,446.70 × 13,877.87
  4. Step 4: Simplify right side
    31,638.58x = 658,458,827.91
  5. Step 5: Solve for x
    x = 658,458,827.91/31,638.58
  6. Step 6: Final answer
    x = 20,811.90

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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.