Home / 15,711.44-21,681.24-8,637.82

Finding the Fourth Proportional to 15,711.44, 21,681.24 and 8,637.82

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Solution

The fourth proportional to 15,711.44, 21,681.24 and 8,637.82 is: 11,919.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.44 : 21,681.24 = 8,637.82 : x
  2. Step 2: Convert to fraction form
    15,711.44/21,681.24 = 8,637.82/x
  3. Step 3: Cross multiply
    15,711.44x = 21,681.24 × 8,637.82
  4. Step 4: Simplify right side
    15,711.44x = 187,278,648.50
  5. Step 5: Solve for x
    x = 187,278,648.50/15,711.44
  6. Step 6: Final answer
    x = 11,919.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.