Home / 20,726.49-31,107.76-10,872.71

Finding the Fourth Proportional to 20,726.49, 31,107.76 and 10,872.71

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Solution

The fourth proportional to 20,726.49, 31,107.76 and 10,872.71 is: 16,318.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.49 : 31,107.76 = 10,872.71 : x
  2. Step 2: Convert to fraction form
    20,726.49/31,107.76 = 10,872.71/x
  3. Step 3: Cross multiply
    20,726.49x = 31,107.76 × 10,872.71
  4. Step 4: Simplify right side
    20,726.49x = 338,225,470.51
  5. Step 5: Solve for x
    x = 338,225,470.51/20,726.49
  6. Step 6: Final answer
    x = 16,318.51

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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.