Home / 20,983.52-31,480.80-10,456.64

Finding the Fourth Proportional to 20,983.52, 31,480.80 and 10,456.64

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Solution

The fourth proportional to 20,983.52, 31,480.80 and 10,456.64 is: 15,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.52 : 31,480.80 = 10,456.64 : x
  2. Step 2: Convert to fraction form
    20,983.52/31,480.80 = 10,456.64/x
  3. Step 3: Cross multiply
    20,983.52x = 31,480.80 × 10,456.64
  4. Step 4: Simplify right side
    20,983.52x = 329,183,392.51
  5. Step 5: Solve for x
    x = 329,183,392.51/20,983.52
  6. Step 6: Final answer
    x = 15,687.71

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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.