Home / 31,856.90-47,791.10-13,126.70

Finding the Fourth Proportional to 31,856.90, 47,791.10 and 13,126.70

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Solution

The fourth proportional to 31,856.90, 47,791.10 and 13,126.70 is: 19,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,856.90 : 47,791.10 = 13,126.70 : x
  2. Step 2: Convert to fraction form
    31,856.90/47,791.10 = 13,126.70/x
  3. Step 3: Cross multiply
    31,856.90x = 47,791.10 × 13,126.70
  4. Step 4: Simplify right side
    31,856.90x = 627,339,432.37
  5. Step 5: Solve for x
    x = 627,339,432.37/31,856.90
  6. Step 6: Final answer
    x = 19,692.42

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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.