Home / 20,372.90-28,114.57-11,420.41

Finding the Fourth Proportional to 20,372.90, 28,114.57 and 11,420.41

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Solution

The fourth proportional to 20,372.90, 28,114.57 and 11,420.41 is: 15,760.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.90 : 28,114.57 = 11,420.41 : x
  2. Step 2: Convert to fraction form
    20,372.90/28,114.57 = 11,420.41/x
  3. Step 3: Cross multiply
    20,372.90x = 28,114.57 × 11,420.41
  4. Step 4: Simplify right side
    20,372.90x = 321,079,965.79
  5. Step 5: Solve for x
    x = 321,079,965.79/20,372.90
  6. Step 6: Final answer
    x = 15,760.15

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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.