Home / 15,085.24-20,817.81-8,279.52

Finding the Fourth Proportional to 15,085.24, 20,817.81 and 8,279.52

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Solution

The fourth proportional to 15,085.24, 20,817.81 and 8,279.52 is: 11,425.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.24 : 20,817.81 = 8,279.52 : x
  2. Step 2: Convert to fraction form
    15,085.24/20,817.81 = 8,279.52/x
  3. Step 3: Cross multiply
    15,085.24x = 20,817.81 × 8,279.52
  4. Step 4: Simplify right side
    15,085.24x = 172,361,396.18
  5. Step 5: Solve for x
    x = 172,361,396.18/15,085.24
  6. Step 6: Final answer
    x = 11,425.83

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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.