Home / 20,871.04-28,801.92-11,439.28

Finding the Fourth Proportional to 20,871.04, 28,801.92 and 11,439.28

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Solution

The fourth proportional to 20,871.04, 28,801.92 and 11,439.28 is: 15,786.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.04 : 28,801.92 = 11,439.28 : x
  2. Step 2: Convert to fraction form
    20,871.04/28,801.92 = 11,439.28/x
  3. Step 3: Cross multiply
    20,871.04x = 28,801.92 × 11,439.28
  4. Step 4: Simplify right side
    20,871.04x = 329,473,227.42
  5. Step 5: Solve for x
    x = 329,473,227.42/20,871.04
  6. Step 6: Final answer
    x = 15,786.14

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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.