Home / 20,863.17-28,791.54-11,431.13

Finding the Fourth Proportional to 20,863.17, 28,791.54 and 11,431.13

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Solution

The fourth proportional to 20,863.17, 28,791.54 and 11,431.13 is: 15,775.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.17 : 28,791.54 = 11,431.13 : x
  2. Step 2: Convert to fraction form
    20,863.17/28,791.54 = 11,431.13/x
  3. Step 3: Cross multiply
    20,863.17x = 28,791.54 × 11,431.13
  4. Step 4: Simplify right side
    20,863.17x = 329,119,692.68
  5. Step 5: Solve for x
    x = 329,119,692.68/20,863.17
  6. Step 6: Final answer
    x = 15,775.15

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Half scale
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Double scale
Find fourth proportional to 20,864.17, 28,792.92 and 11,432.13
Similar ratio
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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.