Home / 15,489.30-21,375.94-8,775.22

Finding the Fourth Proportional to 15,489.30, 21,375.94 and 8,775.22

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Solution

The fourth proportional to 15,489.30, 21,375.94 and 8,775.22 is: 12,110.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.30 : 21,375.94 = 8,775.22 : x
  2. Step 2: Convert to fraction form
    15,489.30/21,375.94 = 8,775.22/x
  3. Step 3: Cross multiply
    15,489.30x = 21,375.94 × 8,775.22
  4. Step 4: Simplify right side
    15,489.30x = 187,578,576.21
  5. Step 5: Solve for x
    x = 187,578,576.21/15,489.30
  6. Step 6: Final answer
    x = 12,110.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.