Home / 13,251.20-18,287.60-8,767.12

Finding the Fourth Proportional to 13,251.20, 18,287.60 and 8,767.12

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Solution

The fourth proportional to 13,251.20, 18,287.60 and 8,767.12 is: 12,099.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.20 : 18,287.60 = 8,767.12 : x
  2. Step 2: Convert to fraction form
    13,251.20/18,287.60 = 8,767.12/x
  3. Step 3: Cross multiply
    13,251.20x = 18,287.60 × 8,767.12
  4. Step 4: Simplify right side
    13,251.20x = 160,329,583.71
  5. Step 5: Solve for x
    x = 160,329,583.71/13,251.20
  6. Step 6: Final answer
    x = 12,099.25

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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.