Home / 20,943.72-31,421.79-7,616.46

Finding the Fourth Proportional to 20,943.72, 31,421.79 and 7,616.46

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Solution

The fourth proportional to 20,943.72, 31,421.79 and 7,616.46 is: 11,426.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.72 : 31,421.79 = 7,616.46 : x
  2. Step 2: Convert to fraction form
    20,943.72/31,421.79 = 7,616.46/x
  3. Step 3: Cross multiply
    20,943.72x = 31,421.79 × 7,616.46
  4. Step 4: Simplify right side
    20,943.72x = 239,322,806.66
  5. Step 5: Solve for x
    x = 239,322,806.66/20,943.72
  6. Step 6: Final answer
    x = 11,426.95

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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.