Home / 21,249.32-31,873.18-12,015.40

Finding the Fourth Proportional to 21,249.32, 31,873.18 and 12,015.40

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Solution

The fourth proportional to 21,249.32, 31,873.18 and 12,015.40 is: 18,022.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.32 : 31,873.18 = 12,015.40 : x
  2. Step 2: Convert to fraction form
    21,249.32/31,873.18 = 12,015.40/x
  3. Step 3: Cross multiply
    21,249.32x = 31,873.18 × 12,015.40
  4. Step 4: Simplify right side
    21,249.32x = 382,969,006.97
  5. Step 5: Solve for x
    x = 382,969,006.97/21,249.32
  6. Step 6: Final answer
    x = 18,022.65

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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.