Home / 65,781.28-98,684.09-20,813.95

Finding the Fourth Proportional to 65,781.28, 98,684.09 and 20,813.95

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Solution

The fourth proportional to 65,781.28, 98,684.09 and 20,813.95 is: 31,224.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.28 : 98,684.09 = 20,813.95 : x
  2. Step 2: Convert to fraction form
    65,781.28/98,684.09 = 20,813.95/x
  3. Step 3: Cross multiply
    65,781.28x = 98,684.09 × 20,813.95
  4. Step 4: Simplify right side
    65,781.28x = 2,054,005,734.34
  5. Step 5: Solve for x
    x = 2,054,005,734.34/65,781.28
  6. Step 6: Final answer
    x = 31,224.78

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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.