Home / 8,712.20-12,016.71-5,356.86

Finding the Fourth Proportional to 8,712.20, 12,016.71 and 5,356.86

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Solution

The fourth proportional to 8,712.20, 12,016.71 and 5,356.86 is: 7,388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.20 : 12,016.71 = 5,356.86 : x
  2. Step 2: Convert to fraction form
    8,712.20/12,016.71 = 5,356.86/x
  3. Step 3: Cross multiply
    8,712.20x = 12,016.71 × 5,356.86
  4. Step 4: Simplify right side
    8,712.20x = 64,371,833.13
  5. Step 5: Solve for x
    x = 64,371,833.13/8,712.20
  6. Step 6: Final answer
    x = 7,388.70

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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.