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Finding the Fourth Proportional to 21,850.52, 32,780.70 and 7,999.52

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Solution

The fourth proportional to 21,850.52, 32,780.70 and 7,999.52 is: 12,001.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.52 : 32,780.70 = 7,999.52 : x
  2. Step 2: Convert to fraction form
    21,850.52/32,780.70 = 7,999.52/x
  3. Step 3: Cross multiply
    21,850.52x = 32,780.70 × 7,999.52
  4. Step 4: Simplify right side
    21,850.52x = 262,229,865.26
  5. Step 5: Solve for x
    x = 262,229,865.26/21,850.52
  6. Step 6: Final answer
    x = 12,001.08

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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.