Home / 5,121.80-7,682.70-1,659.40

Finding the Fourth Proportional to 5,121.80, 7,682.70 and 1,659.40

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Solution

The fourth proportional to 5,121.80, 7,682.70 and 1,659.40 is: 2,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.80 : 7,682.70 = 1,659.40 : x
  2. Step 2: Convert to fraction form
    5,121.80/7,682.70 = 1,659.40/x
  3. Step 3: Cross multiply
    5,121.80x = 7,682.70 × 1,659.40
  4. Step 4: Simplify right side
    5,121.80x = 12,748,672.38
  5. Step 5: Solve for x
    x = 12,748,672.38/5,121.80
  6. Step 6: Final answer
    x = 2,489.10

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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.