Home / 42,521.66-63,786.08-12,939.75

Finding the Fourth Proportional to 42,521.66, 63,786.08 and 12,939.75

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Solution

The fourth proportional to 42,521.66, 63,786.08 and 12,939.75 is: 19,410.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,521.66 : 63,786.08 = 12,939.75 : x
  2. Step 2: Convert to fraction form
    42,521.66/63,786.08 = 12,939.75/x
  3. Step 3: Cross multiply
    42,521.66x = 63,786.08 × 12,939.75
  4. Step 4: Simplify right side
    42,521.66x = 825,375,961.03
  5. Step 5: Solve for x
    x = 825,375,961.03/42,521.66
  6. Step 6: Final answer
    x = 19,410.72

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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.