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Finding the Fourth Proportional to 21,951.60, 32,921.03 and 15,659.28

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Solution

The fourth proportional to 21,951.60, 32,921.03 and 15,659.28 is: 23,484.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.60 : 32,921.03 = 15,659.28 : x
  2. Step 2: Convert to fraction form
    21,951.60/32,921.03 = 15,659.28/x
  3. Step 3: Cross multiply
    21,951.60x = 32,921.03 × 15,659.28
  4. Step 4: Simplify right side
    21,951.60x = 515,519,462.05
  5. Step 5: Solve for x
    x = 515,519,462.05/21,951.60
  6. Step 6: Final answer
    x = 23,484.37

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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.