Home / 21,179.32-31,723.75-11,152.45

Finding the Fourth Proportional to 21,179.32, 31,723.75 and 11,152.45

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Solution

The fourth proportional to 21,179.32, 31,723.75 and 11,152.45 is: 16,704.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.32 : 31,723.75 = 11,152.45 : x
  2. Step 2: Convert to fraction form
    21,179.32/31,723.75 = 11,152.45/x
  3. Step 3: Cross multiply
    21,179.32x = 31,723.75 × 11,152.45
  4. Step 4: Simplify right side
    21,179.32x = 353,797,589.28
  5. Step 5: Solve for x
    x = 353,797,589.28/21,179.32
  6. Step 6: Final answer
    x = 16,704.86

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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.