Home / 20,963.13-31,444.69-5,380.75

Finding the Fourth Proportional to 20,963.13, 31,444.69 and 5,380.75

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Solution

The fourth proportional to 20,963.13, 31,444.69 and 5,380.75 is: 8,071.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.13 : 31,444.69 = 5,380.75 : x
  2. Step 2: Convert to fraction form
    20,963.13/31,444.69 = 5,380.75/x
  3. Step 3: Cross multiply
    20,963.13x = 31,444.69 × 5,380.75
  4. Step 4: Simplify right side
    20,963.13x = 169,196,015.72
  5. Step 5: Solve for x
    x = 169,196,015.72/20,963.13
  6. Step 6: Final answer
    x = 8,071.12

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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.