Home / 20,863.89-31,279.41-10,326.51

Finding the Fourth Proportional to 20,863.89, 31,279.41 and 10,326.51

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Solution

The fourth proportional to 20,863.89, 31,279.41 and 10,326.51 is: 15,481.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.89 : 31,279.41 = 10,326.51 : x
  2. Step 2: Convert to fraction form
    20,863.89/31,279.41 = 10,326.51/x
  3. Step 3: Cross multiply
    20,863.89x = 31,279.41 × 10,326.51
  4. Step 4: Simplify right side
    20,863.89x = 323,007,140.16
  5. Step 5: Solve for x
    x = 323,007,140.16/20,863.89
  6. Step 6: Final answer
    x = 15,481.64

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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.