Home / 7,642.85-10,540.40-5,517.81

Finding the Fourth Proportional to 7,642.85, 10,540.40 and 5,517.81

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Solution

The fourth proportional to 7,642.85, 10,540.40 and 5,517.81 is: 7,609.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,642.85 : 10,540.40 = 5,517.81 : x
  2. Step 2: Convert to fraction form
    7,642.85/10,540.40 = 5,517.81/x
  3. Step 3: Cross multiply
    7,642.85x = 10,540.40 × 5,517.81
  4. Step 4: Simplify right side
    7,642.85x = 58,159,896.93
  5. Step 5: Solve for x
    x = 58,159,896.93/7,642.85
  6. Step 6: Final answer
    x = 7,609.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.