Home / 21,121.26-31,702.68-15,559.02

Finding the Fourth Proportional to 21,121.26, 31,702.68 and 15,559.02

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Solution

The fourth proportional to 21,121.26, 31,702.68 and 15,559.02 is: 23,353.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.26 : 31,702.68 = 15,559.02 : x
  2. Step 2: Convert to fraction form
    21,121.26/31,702.68 = 15,559.02/x
  3. Step 3: Cross multiply
    21,121.26x = 31,702.68 × 15,559.02
  4. Step 4: Simplify right side
    21,121.26x = 493,262,632.17
  5. Step 5: Solve for x
    x = 493,262,632.17/21,121.26
  6. Step 6: Final answer
    x = 23,353.84

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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.