Home / 10,146.75-15,220.16-3,990.75

Finding the Fourth Proportional to 10,146.75, 15,220.16 and 3,990.75

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Solution

The fourth proportional to 10,146.75, 15,220.16 and 3,990.75 is: 5,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,146.75 : 15,220.16 = 3,990.75 : x
  2. Step 2: Convert to fraction form
    10,146.75/15,220.16 = 3,990.75/x
  3. Step 3: Cross multiply
    10,146.75x = 15,220.16 × 3,990.75
  4. Step 4: Simplify right side
    10,146.75x = 60,739,833.57
  5. Step 5: Solve for x
    x = 60,739,833.57/10,146.75
  6. Step 6: Final answer
    x = 5,986.14

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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.