Home / 8,715.92-12,028.68-4,990.16

Finding the Fourth Proportional to 8,715.92, 12,028.68 and 4,990.16

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Solution

The fourth proportional to 8,715.92, 12,028.68 and 4,990.16 is: 6,886.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.92 : 12,028.68 = 4,990.16 : x
  2. Step 2: Convert to fraction form
    8,715.92/12,028.68 = 4,990.16/x
  3. Step 3: Cross multiply
    8,715.92x = 12,028.68 × 4,990.16
  4. Step 4: Simplify right side
    8,715.92x = 60,025,037.79
  5. Step 5: Solve for x
    x = 60,025,037.79/8,715.92
  6. Step 6: Final answer
    x = 6,886.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.