Home / 20,854.81-31,286.40-9,168.04

Finding the Fourth Proportional to 20,854.81, 31,286.40 and 9,168.04

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Solution

The fourth proportional to 20,854.81, 31,286.40 and 9,168.04 is: 13,753.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.81 : 31,286.40 = 9,168.04 : x
  2. Step 2: Convert to fraction form
    20,854.81/31,286.40 = 9,168.04/x
  3. Step 3: Cross multiply
    20,854.81x = 31,286.40 × 9,168.04
  4. Step 4: Simplify right side
    20,854.81x = 286,834,966.66
  5. Step 5: Solve for x
    x = 286,834,966.66/20,854.81
  6. Step 6: Final answer
    x = 13,753.90

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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.