Home / 8,120.89-11,207.28-5,731.63

Finding the Fourth Proportional to 8,120.89, 11,207.28 and 5,731.63

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Solution

The fourth proportional to 8,120.89, 11,207.28 and 5,731.63 is: 7,909.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.89 : 11,207.28 = 5,731.63 : x
  2. Step 2: Convert to fraction form
    8,120.89/11,207.28 = 5,731.63/x
  3. Step 3: Cross multiply
    8,120.89x = 11,207.28 × 5,731.63
  4. Step 4: Simplify right side
    8,120.89x = 64,235,982.59
  5. Step 5: Solve for x
    x = 64,235,982.59/8,120.89
  6. Step 6: Final answer
    x = 7,909.97

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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.