Home / 20,301.40-30,431.34-11,517.76

Finding the Fourth Proportional to 20,301.40, 30,431.34 and 11,517.76

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Solution

The fourth proportional to 20,301.40, 30,431.34 and 11,517.76 is: 17,264.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,301.40 : 30,431.34 = 11,517.76 : x
  2. Step 2: Convert to fraction form
    20,301.40/30,431.34 = 11,517.76/x
  3. Step 3: Cross multiply
    20,301.40x = 30,431.34 × 11,517.76
  4. Step 4: Simplify right side
    20,301.40x = 350,500,870.60
  5. Step 5: Solve for x
    x = 350,500,870.60/20,301.40
  6. Step 6: Final answer
    x = 17,264.86

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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.