Home / 8,487.36-11,711.16-5,129.64

Finding the Fourth Proportional to 8,487.36, 11,711.16 and 5,129.64

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Solution

The fourth proportional to 8,487.36, 11,711.16 and 5,129.64 is: 7,078.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.36 : 11,711.16 = 5,129.64 : x
  2. Step 2: Convert to fraction form
    8,487.36/11,711.16 = 5,129.64/x
  3. Step 3: Cross multiply
    8,487.36x = 11,711.16 × 5,129.64
  4. Step 4: Simplify right side
    8,487.36x = 60,074,034.78
  5. Step 5: Solve for x
    x = 60,074,034.78/8,487.36
  6. Step 6: Final answer
    x = 7,078.06

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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.