Home / 7,679.31-11,521.40-4,215.75

Finding the Fourth Proportional to 7,679.31, 11,521.40 and 4,215.75

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Solution

The fourth proportional to 7,679.31, 11,521.40 and 4,215.75 is: 6,324.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.31 : 11,521.40 = 4,215.75 : x
  2. Step 2: Convert to fraction form
    7,679.31/11,521.40 = 4,215.75/x
  3. Step 3: Cross multiply
    7,679.31x = 11,521.40 × 4,215.75
  4. Step 4: Simplify right side
    7,679.31x = 48,571,320.97
  5. Step 5: Solve for x
    x = 48,571,320.97/7,679.31
  6. Step 6: Final answer
    x = 6,324.96

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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.