Home / 8,811.76-12,155.16-5,979.28

Finding the Fourth Proportional to 8,811.76, 12,155.16 and 5,979.28

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Solution

The fourth proportional to 8,811.76, 12,155.16 and 5,979.28 is: 8,247.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.76 : 12,155.16 = 5,979.28 : x
  2. Step 2: Convert to fraction form
    8,811.76/12,155.16 = 5,979.28/x
  3. Step 3: Cross multiply
    8,811.76x = 12,155.16 × 5,979.28
  4. Step 4: Simplify right side
    8,811.76x = 72,679,105.08
  5. Step 5: Solve for x
    x = 72,679,105.08/8,811.76
  6. Step 6: Final answer
    x = 8,247.97

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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.