Home / 20,347.76-28,082.40-12,391.14

Finding the Fourth Proportional to 20,347.76, 28,082.40 and 12,391.14

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Solution

The fourth proportional to 20,347.76, 28,082.40 and 12,391.14 is: 17,101.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.76 : 28,082.40 = 12,391.14 : x
  2. Step 2: Convert to fraction form
    20,347.76/28,082.40 = 12,391.14/x
  3. Step 3: Cross multiply
    20,347.76x = 28,082.40 × 12,391.14
  4. Step 4: Simplify right side
    20,347.76x = 347,972,949.94
  5. Step 5: Solve for x
    x = 347,972,949.94/20,347.76
  6. Step 6: Final answer
    x = 17,101.29

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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.