Home / 15,791.32-21,791.76-8,717.56

Finding the Fourth Proportional to 15,791.32, 21,791.76 and 8,717.56

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Solution

The fourth proportional to 15,791.32, 21,791.76 and 8,717.56 is: 12,030.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,791.32 : 21,791.76 = 8,717.56 : x
  2. Step 2: Convert to fraction form
    15,791.32/21,791.76 = 8,717.56/x
  3. Step 3: Cross multiply
    15,791.32x = 21,791.76 × 8,717.56
  4. Step 4: Simplify right side
    15,791.32x = 189,970,975.31
  5. Step 5: Solve for x
    x = 189,970,975.31/15,791.32
  6. Step 6: Final answer
    x = 12,030.09

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1.5x scale

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.