Home / 8,711.20-12,015.33-5,355.86

Finding the Fourth Proportional to 8,711.20, 12,015.33 and 5,355.86

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Solution

The fourth proportional to 8,711.20, 12,015.33 and 5,355.86 is: 7,387.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.20 : 12,015.33 = 5,355.86 : x
  2. Step 2: Convert to fraction form
    8,711.20/12,015.33 = 5,355.86/x
  3. Step 3: Cross multiply
    8,711.20x = 12,015.33 × 5,355.86
  4. Step 4: Simplify right side
    8,711.20x = 64,352,345.17
  5. Step 5: Solve for x
    x = 64,352,345.17/8,711.20
  6. Step 6: Final answer
    x = 7,387.31

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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.