Home / 21,839.15-32,729.10-9,978.22

Finding the Fourth Proportional to 21,839.15, 32,729.10 and 9,978.22

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Solution

The fourth proportional to 21,839.15, 32,729.10 and 9,978.22 is: 14,953.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.15 : 32,729.10 = 9,978.22 : x
  2. Step 2: Convert to fraction form
    21,839.15/32,729.10 = 9,978.22/x
  3. Step 3: Cross multiply
    21,839.15x = 32,729.10 × 9,978.22
  4. Step 4: Simplify right side
    21,839.15x = 326,578,163.70
  5. Step 5: Solve for x
    x = 326,578,163.70/21,839.15
  6. Step 6: Final answer
    x = 14,953.79

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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.