Home / 5,123.06-7,686.88-2,489.12

Finding the Fourth Proportional to 5,123.06, 7,686.88 and 2,489.12

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Solution

The fourth proportional to 5,123.06, 7,686.88 and 2,489.12 is: 3,734.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.06 : 7,686.88 = 2,489.12 : x
  2. Step 2: Convert to fraction form
    5,123.06/7,686.88 = 2,489.12/x
  3. Step 3: Cross multiply
    5,123.06x = 7,686.88 × 2,489.12
  4. Step 4: Simplify right side
    5,123.06x = 19,133,566.75
  5. Step 5: Solve for x
    x = 19,133,566.75/5,123.06
  6. Step 6: Final answer
    x = 3,734.79

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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.