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Finding the Fourth Proportional to 20,641.81, 30,957.92 and 10,101.23

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Solution

The fourth proportional to 20,641.81, 30,957.92 and 10,101.23 is: 15,149.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.81 : 30,957.92 = 10,101.23 : x
  2. Step 2: Convert to fraction form
    20,641.81/30,957.92 = 10,101.23/x
  3. Step 3: Cross multiply
    20,641.81x = 30,957.92 × 10,101.23
  4. Step 4: Simplify right side
    20,641.81x = 312,713,264.31
  5. Step 5: Solve for x
    x = 312,713,264.31/20,641.81
  6. Step 6: Final answer
    x = 15,149.51

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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.