Home / 20,711.36-28,581.72-11,279.84

Finding the Fourth Proportional to 20,711.36, 28,581.72 and 11,279.84

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Solution

The fourth proportional to 20,711.36, 28,581.72 and 11,279.84 is: 15,566.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.36 : 28,581.72 = 11,279.84 : x
  2. Step 2: Convert to fraction form
    20,711.36/28,581.72 = 11,279.84/x
  3. Step 3: Cross multiply
    20,711.36x = 28,581.72 × 11,279.84
  4. Step 4: Simplify right side
    20,711.36x = 322,397,228.52
  5. Step 5: Solve for x
    x = 322,397,228.52/20,711.36
  6. Step 6: Final answer
    x = 15,566.20

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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.