Home / 21,254.18-31,882.31-8,107.57

Finding the Fourth Proportional to 21,254.18, 31,882.31 and 8,107.57

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Solution

The fourth proportional to 21,254.18, 31,882.31 and 8,107.57 is: 12,161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.18 : 31,882.31 = 8,107.57 : x
  2. Step 2: Convert to fraction form
    21,254.18/31,882.31 = 8,107.57/x
  3. Step 3: Cross multiply
    21,254.18x = 31,882.31 × 8,107.57
  4. Step 4: Simplify right side
    21,254.18x = 258,487,860.14
  5. Step 5: Solve for x
    x = 258,487,860.14/21,254.18
  6. Step 6: Final answer
    x = 12,161.74

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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.