Home / 15,740.88-21,721.59-8,665.95

Finding the Fourth Proportional to 15,740.88, 21,721.59 and 8,665.95

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Solution

The fourth proportional to 15,740.88, 21,721.59 and 8,665.95 is: 11,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.88 : 21,721.59 = 8,665.95 : x
  2. Step 2: Convert to fraction form
    15,740.88/21,721.59 = 8,665.95/x
  3. Step 3: Cross multiply
    15,740.88x = 21,721.59 × 8,665.95
  4. Step 4: Simplify right side
    15,740.88x = 188,238,212.86
  5. Step 5: Solve for x
    x = 188,238,212.86/15,740.88
  6. Step 6: Final answer
    x = 11,958.56

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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.