Home / 20,320.38-28,044.45-11,370.15

Finding the Fourth Proportional to 20,320.38, 28,044.45 and 11,370.15

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Solution

The fourth proportional to 20,320.38, 28,044.45 and 11,370.15 is: 15,692.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.38 : 28,044.45 = 11,370.15 : x
  2. Step 2: Convert to fraction form
    20,320.38/28,044.45 = 11,370.15/x
  3. Step 3: Cross multiply
    20,320.38x = 28,044.45 × 11,370.15
  4. Step 4: Simplify right side
    20,320.38x = 318,869,603.17
  5. Step 5: Solve for x
    x = 318,869,603.17/20,320.38
  6. Step 6: Final answer
    x = 15,692.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.