Home / 21,271.22-31,876.59-15,680.60

Finding the Fourth Proportional to 21,271.22, 31,876.59 and 15,680.60

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Solution

The fourth proportional to 21,271.22, 31,876.59 and 15,680.60 is: 23,498.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.22 : 31,876.59 = 15,680.60 : x
  2. Step 2: Convert to fraction form
    21,271.22/31,876.59 = 15,680.60/x
  3. Step 3: Cross multiply
    21,271.22x = 31,876.59 × 15,680.60
  4. Step 4: Simplify right side
    21,271.22x = 499,844,057.15
  5. Step 5: Solve for x
    x = 499,844,057.15/21,271.22
  6. Step 6: Final answer
    x = 23,498.61

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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.