Home / 20,540.40-30,812.76-6,686.16

Finding the Fourth Proportional to 20,540.40, 30,812.76 and 6,686.16

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Solution

The fourth proportional to 20,540.40, 30,812.76 and 6,686.16 is: 10,029.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.40 : 30,812.76 = 6,686.16 : x
  2. Step 2: Convert to fraction form
    20,540.40/30,812.76 = 6,686.16/x
  3. Step 3: Cross multiply
    20,540.40x = 30,812.76 × 6,686.16
  4. Step 4: Simplify right side
    20,540.40x = 206,019,043.40
  5. Step 5: Solve for x
    x = 206,019,043.40/20,540.40
  6. Step 6: Final answer
    x = 10,029.94

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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.