Home / 5,121.95-7,684.13-1,659.20

Finding the Fourth Proportional to 5,121.95, 7,684.13 and 1,659.20

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Solution

The fourth proportional to 5,121.95, 7,684.13 and 1,659.20 is: 2,489.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.95 : 7,684.13 = 1,659.20 : x
  2. Step 2: Convert to fraction form
    5,121.95/7,684.13 = 1,659.20/x
  3. Step 3: Cross multiply
    5,121.95x = 7,684.13 × 1,659.20
  4. Step 4: Simplify right side
    5,121.95x = 12,749,461.78
  5. Step 5: Solve for x
    x = 12,749,461.78/5,121.95
  6. Step 6: Final answer
    x = 2,489.18

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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.