Home / 8,899.64-12,280.68-5,121.80

Finding the Fourth Proportional to 8,899.64, 12,280.68 and 5,121.80

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Solution

The fourth proportional to 8,899.64, 12,280.68 and 5,121.80 is: 7,067.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899.64 : 12,280.68 = 5,121.80 : x
  2. Step 2: Convert to fraction form
    8,899.64/12,280.68 = 5,121.80/x
  3. Step 3: Cross multiply
    8,899.64x = 12,280.68 × 5,121.80
  4. Step 4: Simplify right side
    8,899.64x = 62,899,125.42
  5. Step 5: Solve for x
    x = 62,899,125.42/8,899.64
  6. Step 6: Final answer
    x = 7,067.61

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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.