Home / 12,640.52-18,972.50-6,404.94

Finding the Fourth Proportional to 12,640.52, 18,972.50 and 6,404.94

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Solution

The fourth proportional to 12,640.52, 18,972.50 and 6,404.94 is: 9,613.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.52 : 18,972.50 = 6,404.94 : x
  2. Step 2: Convert to fraction form
    12,640.52/18,972.50 = 6,404.94/x
  3. Step 3: Cross multiply
    12,640.52x = 18,972.50 × 6,404.94
  4. Step 4: Simplify right side
    12,640.52x = 121,517,692.13
  5. Step 5: Solve for x
    x = 121,517,692.13/12,640.52
  6. Step 6: Final answer
    x = 9,613.35

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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.