Home / 20,334.20-28,061.19-11,381.70

Finding the Fourth Proportional to 20,334.20, 28,061.19 and 11,381.70

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Solution

The fourth proportional to 20,334.20, 28,061.19 and 11,381.70 is: 15,706.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.20 : 28,061.19 = 11,381.70 : x
  2. Step 2: Convert to fraction form
    20,334.20/28,061.19 = 11,381.70/x
  3. Step 3: Cross multiply
    20,334.20x = 28,061.19 × 11,381.70
  4. Step 4: Simplify right side
    20,334.20x = 319,384,095.99
  5. Step 5: Solve for x
    x = 319,384,095.99/20,334.20
  6. Step 6: Final answer
    x = 15,706.75

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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.