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Finding the Fourth Proportional to 21,951.64, 32,930.16 and 7,156.60

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Solution

The fourth proportional to 21,951.64, 32,930.16 and 7,156.60 is: 10,735.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.64 : 32,930.16 = 7,156.60 : x
  2. Step 2: Convert to fraction form
    21,951.64/32,930.16 = 7,156.60/x
  3. Step 3: Cross multiply
    21,951.64x = 32,930.16 × 7,156.60
  4. Step 4: Simplify right side
    21,951.64x = 235,667,983.06
  5. Step 5: Solve for x
    x = 235,667,983.06/21,951.64
  6. Step 6: Final answer
    x = 10,735.78

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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.