Home / 20,725.13-31,061.69-8,864.99

Finding the Fourth Proportional to 20,725.13, 31,061.69 and 8,864.99

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Solution

The fourth proportional to 20,725.13, 31,061.69 and 8,864.99 is: 13,286.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.13 : 31,061.69 = 8,864.99 : x
  2. Step 2: Convert to fraction form
    20,725.13/31,061.69 = 8,864.99/x
  3. Step 3: Cross multiply
    20,725.13x = 31,061.69 × 8,864.99
  4. Step 4: Simplify right side
    20,725.13x = 275,361,438.09
  5. Step 5: Solve for x
    x = 275,361,438.09/20,725.13
  6. Step 6: Final answer
    x = 13,286.35

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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.