Home / 20,381.38-28,130.97-12,002.74

Finding the Fourth Proportional to 20,381.38, 28,130.97 and 12,002.74

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Solution

The fourth proportional to 20,381.38, 28,130.97 and 12,002.74 is: 16,566.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.38 : 28,130.97 = 12,002.74 : x
  2. Step 2: Convert to fraction form
    20,381.38/28,130.97 = 12,002.74/x
  3. Step 3: Cross multiply
    20,381.38x = 28,130.97 × 12,002.74
  4. Step 4: Simplify right side
    20,381.38x = 337,648,718.86
  5. Step 5: Solve for x
    x = 337,648,718.86/20,381.38
  6. Step 6: Final answer
    x = 16,566.53

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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.