Home / 21,252.32-31,879.08-12,481.23

Finding the Fourth Proportional to 21,252.32, 31,879.08 and 12,481.23

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Solution

The fourth proportional to 21,252.32, 31,879.08 and 12,481.23 is: 18,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,252.32 : 31,879.08 = 12,481.23 : x
  2. Step 2: Convert to fraction form
    21,252.32/31,879.08 = 12,481.23/x
  3. Step 3: Cross multiply
    21,252.32x = 31,879.08 × 12,481.23
  4. Step 4: Simplify right side
    21,252.32x = 397,890,129.67
  5. Step 5: Solve for x
    x = 397,890,129.67/21,252.32
  6. Step 6: Final answer
    x = 18,722.20

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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.