Home / 5,121.92-7,679.36-1,660.16

Finding the Fourth Proportional to 5,121.92, 7,679.36 and 1,660.16

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Solution

The fourth proportional to 5,121.92, 7,679.36 and 1,660.16 is: 2,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.92 : 7,679.36 = 1,660.16 : x
  2. Step 2: Convert to fraction form
    5,121.92/7,679.36 = 1,660.16/x
  3. Step 3: Cross multiply
    5,121.92x = 7,679.36 × 1,660.16
  4. Step 4: Simplify right side
    5,121.92x = 12,748,966.30
  5. Step 5: Solve for x
    x = 12,748,966.30/5,121.92
  6. Step 6: Final answer
    x = 2,489.10

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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.