Home / 12,279.26-18,428.10-9,000.80

Finding the Fourth Proportional to 12,279.26, 18,428.10 and 9,000.80

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Solution

The fourth proportional to 12,279.26, 18,428.10 and 9,000.80 is: 13,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.26 : 18,428.10 = 9,000.80 : x
  2. Step 2: Convert to fraction form
    12,279.26/18,428.10 = 9,000.80/x
  3. Step 3: Cross multiply
    12,279.26x = 18,428.10 × 9,000.80
  4. Step 4: Simplify right side
    12,279.26x = 165,867,642.48
  5. Step 5: Solve for x
    x = 165,867,642.48/12,279.26
  6. Step 6: Final answer
    x = 13,507.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.