Home / 12,129.91-18,179.52-5,459.30

Finding the Fourth Proportional to 12,129.91, 18,179.52 and 5,459.30

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Solution

The fourth proportional to 12,129.91, 18,179.52 and 5,459.30 is: 8,182.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.91 : 18,179.52 = 5,459.30 : x
  2. Step 2: Convert to fraction form
    12,129.91/18,179.52 = 5,459.30/x
  3. Step 3: Cross multiply
    12,129.91x = 18,179.52 × 5,459.30
  4. Step 4: Simplify right side
    12,129.91x = 99,247,446.81
  5. Step 5: Solve for x
    x = 99,247,446.81/12,129.91
  6. Step 6: Final answer
    x = 8,182.05

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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.