Home / 8,159.28-11,265.14-5,138.80

Finding the Fourth Proportional to 8,159.28, 11,265.14 and 5,138.80

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Solution

The fourth proportional to 8,159.28, 11,265.14 and 5,138.80 is: 7,094.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,159.28 : 11,265.14 = 5,138.80 : x
  2. Step 2: Convert to fraction form
    8,159.28/11,265.14 = 5,138.80/x
  3. Step 3: Cross multiply
    8,159.28x = 11,265.14 × 5,138.80
  4. Step 4: Simplify right side
    8,159.28x = 57,889,301.43
  5. Step 5: Solve for x
    x = 57,889,301.43/8,159.28
  6. Step 6: Final answer
    x = 7,094.90

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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.