Home / 20,959.41-31,439.19-19,908.28

Finding the Fourth Proportional to 20,959.41, 31,439.19 and 19,908.28

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Solution

The fourth proportional to 20,959.41, 31,439.19 and 19,908.28 is: 29,862.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.41 : 31,439.19 = 19,908.28 : x
  2. Step 2: Convert to fraction form
    20,959.41/31,439.19 = 19,908.28/x
  3. Step 3: Cross multiply
    20,959.41x = 31,439.19 × 19,908.28
  4. Step 4: Simplify right side
    20,959.41x = 625,900,197.49
  5. Step 5: Solve for x
    x = 625,900,197.49/20,959.41
  6. Step 6: Final answer
    x = 29,862.49

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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.