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Finding the Fourth Proportional to 15,959.88, 21,819.60 and 15,347.52

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Solution

The fourth proportional to 15,959.88, 21,819.60 and 15,347.52 is: 20,982.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,959.88 : 21,819.60 = 15,347.52 : x
  2. Step 2: Convert to fraction form
    15,959.88/21,819.60 = 15,347.52/x
  3. Step 3: Cross multiply
    15,959.88x = 21,819.60 × 15,347.52
  4. Step 4: Simplify right side
    15,959.88x = 334,876,747.39
  5. Step 5: Solve for x
    x = 334,876,747.39/15,959.88
  6. Step 6: Final answer
    x = 20,982.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.