Home / 10,921.80-16,371.90-4,339.20

Finding the Fourth Proportional to 10,921.80, 16,371.90 and 4,339.20

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Solution

The fourth proportional to 10,921.80, 16,371.90 and 4,339.20 is: 6,504.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.80 : 16,371.90 = 4,339.20 : x
  2. Step 2: Convert to fraction form
    10,921.80/16,371.90 = 4,339.20/x
  3. Step 3: Cross multiply
    10,921.80x = 16,371.90 × 4,339.20
  4. Step 4: Simplify right side
    10,921.80x = 71,040,948.48
  5. Step 5: Solve for x
    x = 71,040,948.48/10,921.80
  6. Step 6: Final answer
    x = 6,504.51

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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.