Home / 10,120.92-15,185.70-5,731.80

Finding the Fourth Proportional to 10,120.92, 15,185.70 and 5,731.80

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Solution

The fourth proportional to 10,120.92, 15,185.70 and 5,731.80 is: 8,600.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.92 : 15,185.70 = 5,731.80 : x
  2. Step 2: Convert to fraction form
    10,120.92/15,185.70 = 5,731.80/x
  3. Step 3: Cross multiply
    10,120.92x = 15,185.70 × 5,731.80
  4. Step 4: Simplify right side
    10,120.92x = 87,041,395.26
  5. Step 5: Solve for x
    x = 87,041,395.26/10,120.92
  6. Step 6: Final answer
    x = 8,600.15

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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.