Home / 11,422.88-15,761.68-6,386.84

Finding the Fourth Proportional to 11,422.88, 15,761.68 and 6,386.84

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Solution

The fourth proportional to 11,422.88, 15,761.68 and 6,386.84 is: 8,812.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,422.88 : 15,761.68 = 6,386.84 : x
  2. Step 2: Convert to fraction form
    11,422.88/15,761.68 = 6,386.84/x
  3. Step 3: Cross multiply
    11,422.88x = 15,761.68 × 6,386.84
  4. Step 4: Simplify right side
    11,422.88x = 100,667,328.29
  5. Step 5: Solve for x
    x = 100,667,328.29/11,422.88
  6. Step 6: Final answer
    x = 8,812.78

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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.