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Finding the Fourth Proportional to 21,850.40, 32,780.16 and 7,060.16

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Solution

The fourth proportional to 21,850.40, 32,780.16 and 7,060.16 is: 10,591.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.40 : 32,780.16 = 7,060.16 : x
  2. Step 2: Convert to fraction form
    21,850.40/32,780.16 = 7,060.16/x
  3. Step 3: Cross multiply
    21,850.40x = 32,780.16 × 7,060.16
  4. Step 4: Simplify right side
    21,850.40x = 231,433,174.43
  5. Step 5: Solve for x
    x = 231,433,174.43/21,850.40
  6. Step 6: Final answer
    x = 10,591.71

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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.