Home / 12,005.28-18,008.60-3,240.88

Finding the Fourth Proportional to 12,005.28, 18,008.60 and 3,240.88

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Solution

The fourth proportional to 12,005.28, 18,008.60 and 3,240.88 is: 4,861.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.28 : 18,008.60 = 3,240.88 : x
  2. Step 2: Convert to fraction form
    12,005.28/18,008.60 = 3,240.88/x
  3. Step 3: Cross multiply
    12,005.28x = 18,008.60 × 3,240.88
  4. Step 4: Simplify right side
    12,005.28x = 58,363,711.57
  5. Step 5: Solve for x
    x = 58,363,711.57/12,005.28
  6. Step 6: Final answer
    x = 4,861.50

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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.