Home / 20,986.10-31,463.74-9,886.54

Finding the Fourth Proportional to 20,986.10, 31,463.74 and 9,886.54

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Solution

The fourth proportional to 20,986.10, 31,463.74 and 9,886.54 is: 14,822.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.10 : 31,463.74 = 9,886.54 : x
  2. Step 2: Convert to fraction form
    20,986.10/31,463.74 = 9,886.54/x
  3. Step 3: Cross multiply
    20,986.10x = 31,463.74 × 9,886.54
  4. Step 4: Simplify right side
    20,986.10x = 311,067,524.06
  5. Step 5: Solve for x
    x = 311,067,524.06/20,986.10
  6. Step 6: Final answer
    x = 14,822.55

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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.