Home / 8,909.92-12,299.52-5,771.20

Finding the Fourth Proportional to 8,909.92, 12,299.52 and 5,771.20

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Solution

The fourth proportional to 8,909.92, 12,299.52 and 5,771.20 is: 7,966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.92 : 12,299.52 = 5,771.20 : x
  2. Step 2: Convert to fraction form
    8,909.92/12,299.52 = 5,771.20/x
  3. Step 3: Cross multiply
    8,909.92x = 12,299.52 × 5,771.20
  4. Step 4: Simplify right side
    8,909.92x = 70,982,989.82
  5. Step 5: Solve for x
    x = 70,982,989.82/8,909.92
  6. Step 6: Final answer
    x = 7,966.74

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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.