Home / 20,140.38-27,792.18-11,187.72

Finding the Fourth Proportional to 20,140.38, 27,792.18 and 11,187.72

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Solution

The fourth proportional to 20,140.38, 27,792.18 and 11,187.72 is: 15,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.38 : 27,792.18 = 11,187.72 : x
  2. Step 2: Convert to fraction form
    20,140.38/27,792.18 = 11,187.72/x
  3. Step 3: Cross multiply
    20,140.38x = 27,792.18 × 11,187.72
  4. Step 4: Simplify right side
    20,140.38x = 310,931,128.03
  5. Step 5: Solve for x
    x = 310,931,128.03/20,140.38
  6. Step 6: Final answer
    x = 15,438.20

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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.