Home / 8,724.72-13,087.08-6,139.20

Finding the Fourth Proportional to 8,724.72, 13,087.08 and 6,139.20

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Solution

The fourth proportional to 8,724.72, 13,087.08 and 6,139.20 is: 9,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,724.72 : 13,087.08 = 6,139.20 : x
  2. Step 2: Convert to fraction form
    8,724.72/13,087.08 = 6,139.20/x
  3. Step 3: Cross multiply
    8,724.72x = 13,087.08 × 6,139.20
  4. Step 4: Simplify right side
    8,724.72x = 80,344,201.54
  5. Step 5: Solve for x
    x = 80,344,201.54/8,724.72
  6. Step 6: Final answer
    x = 9,208.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.