Home / 20,711.53-28,581.96-11,279.89

Finding the Fourth Proportional to 20,711.53, 28,581.96 and 11,279.89

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Solution

The fourth proportional to 20,711.53, 28,581.96 and 11,279.89 is: 15,566.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.53 : 28,581.96 = 11,279.89 : x
  2. Step 2: Convert to fraction form
    20,711.53/28,581.96 = 11,279.89/x
  3. Step 3: Cross multiply
    20,711.53x = 28,581.96 × 11,279.89
  4. Step 4: Simplify right side
    20,711.53x = 322,401,364.78
  5. Step 5: Solve for x
    x = 322,401,364.78/20,711.53
  6. Step 6: Final answer
    x = 15,566.27

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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.