Home / 5,275.41-7,912.20-1,987.92

Finding the Fourth Proportional to 5,275.41, 7,912.20 and 1,987.92

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Solution

The fourth proportional to 5,275.41, 7,912.20 and 1,987.92 is: 2,981.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.41 : 7,912.20 = 1,987.92 : x
  2. Step 2: Convert to fraction form
    5,275.41/7,912.20 = 1,987.92/x
  3. Step 3: Cross multiply
    5,275.41x = 7,912.20 × 1,987.92
  4. Step 4: Simplify right side
    5,275.41x = 15,728,820.62
  5. Step 5: Solve for x
    x = 15,728,820.62/5,275.41
  6. Step 6: Final answer
    x = 2,981.54

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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.