Home / 21,005.32-31,517.25-11,142.18

Finding the Fourth Proportional to 21,005.32, 31,517.25 and 11,142.18

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Solution

The fourth proportional to 21,005.32, 31,517.25 and 11,142.18 is: 16,718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.32 : 31,517.25 = 11,142.18 : x
  2. Step 2: Convert to fraction form
    21,005.32/31,517.25 = 11,142.18/x
  3. Step 3: Cross multiply
    21,005.32x = 31,517.25 × 11,142.18
  4. Step 4: Simplify right side
    21,005.32x = 351,170,844.75
  5. Step 5: Solve for x
    x = 351,170,844.75/21,005.32
  6. Step 6: Final answer
    x = 16,718.18

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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.