Home / 12,115.60-18,176.10-9,491.20

Finding the Fourth Proportional to 12,115.60, 18,176.10 and 9,491.20

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Solution

The fourth proportional to 12,115.60, 18,176.10 and 9,491.20 is: 14,238.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.60 : 18,176.10 = 9,491.20 : x
  2. Step 2: Convert to fraction form
    12,115.60/18,176.10 = 9,491.20/x
  3. Step 3: Cross multiply
    12,115.60x = 18,176.10 × 9,491.20
  4. Step 4: Simplify right side
    12,115.60x = 172,513,000.32
  5. Step 5: Solve for x
    x = 172,513,000.32/12,115.60
  6. Step 6: Final answer
    x = 14,238.92

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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.