Home / 8,979.60-12,391.68-5,000.64

Finding the Fourth Proportional to 8,979.60, 12,391.68 and 5,000.64

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Solution

The fourth proportional to 8,979.60, 12,391.68 and 5,000.64 is: 6,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.60 : 12,391.68 = 5,000.64 : x
  2. Step 2: Convert to fraction form
    8,979.60/12,391.68 = 5,000.64/x
  3. Step 3: Cross multiply
    8,979.60x = 12,391.68 × 5,000.64
  4. Step 4: Simplify right side
    8,979.60x = 61,966,330.68
  5. Step 5: Solve for x
    x = 61,966,330.68/8,979.60
  6. Step 6: Final answer
    x = 6,900.79

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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.