Home / 21,061.26-31,591.93-5,478.86

Finding the Fourth Proportional to 21,061.26, 31,591.93 and 5,478.86

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Solution

The fourth proportional to 21,061.26, 31,591.93 and 5,478.86 is: 8,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.26 : 31,591.93 = 5,478.86 : x
  2. Step 2: Convert to fraction form
    21,061.26/31,591.93 = 5,478.86/x
  3. Step 3: Cross multiply
    21,061.26x = 31,591.93 × 5,478.86
  4. Step 4: Simplify right side
    21,061.26x = 173,087,761.60
  5. Step 5: Solve for x
    x = 173,087,761.60/21,061.26
  6. Step 6: Final answer
    x = 8,218.30

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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.