Home / 12,213.12-18,279.60-9,275.28

Finding the Fourth Proportional to 12,213.12, 18,279.60 and 9,275.28

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Solution

The fourth proportional to 12,213.12, 18,279.60 and 9,275.28 is: 13,882.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.12 : 18,279.60 = 9,275.28 : x
  2. Step 2: Convert to fraction form
    12,213.12/18,279.60 = 9,275.28/x
  3. Step 3: Cross multiply
    12,213.12x = 18,279.60 × 9,275.28
  4. Step 4: Simplify right side
    12,213.12x = 169,548,408.29
  5. Step 5: Solve for x
    x = 169,548,408.29/12,213.12
  6. Step 6: Final answer
    x = 13,882.48

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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.