Home / 20,945.71-28,871.33-17,162.20

Finding the Fourth Proportional to 20,945.71, 28,871.33 and 17,162.20

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Solution

The fourth proportional to 20,945.71, 28,871.33 and 17,162.20 is: 23,656.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.71 : 28,871.33 = 17,162.20 : x
  2. Step 2: Convert to fraction form
    20,945.71/28,871.33 = 17,162.20/x
  3. Step 3: Cross multiply
    20,945.71x = 28,871.33 × 17,162.20
  4. Step 4: Simplify right side
    20,945.71x = 495,495,539.73
  5. Step 5: Solve for x
    x = 495,495,539.73/20,945.71
  6. Step 6: Final answer
    x = 23,656.18

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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.