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Finding the Fourth Proportional to 21,959.60, 32,939.39 and 5,319.63

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Solution

The fourth proportional to 21,959.60, 32,939.39 and 5,319.63 is: 7,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.60 : 32,939.39 = 5,319.63 : x
  2. Step 2: Convert to fraction form
    21,959.60/32,939.39 = 5,319.63/x
  3. Step 3: Cross multiply
    21,959.60x = 32,939.39 × 5,319.63
  4. Step 4: Simplify right side
    21,959.60x = 175,225,380.52
  5. Step 5: Solve for x
    x = 175,225,380.52/21,959.60
  6. Step 6: Final answer
    x = 7,979.45

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Similar ratio
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1.5x scale

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.