Home / 12,480-18,719.91-5,082.72

Finding the Fourth Proportional to 12,480, 18,719.91 and 5,082.72

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Solution

The fourth proportional to 12,480, 18,719.91 and 5,082.72 is: 7,624.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480 : 18,719.91 = 5,082.72 : x
  2. Step 2: Convert to fraction form
    12,480/18,719.91 = 5,082.72/x
  3. Step 3: Cross multiply
    12,480x = 18,719.91 × 5,082.72
  4. Step 4: Simplify right side
    12,480x = 95,148,060.96
  5. Step 5: Solve for x
    x = 95,148,060.96/12,480
  6. Step 6: Final answer
    x = 7,624.04

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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.