Home / 15,790.79-21,791.24-8,717.16

Finding the Fourth Proportional to 15,790.79, 21,791.24 and 8,717.16

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Solution

The fourth proportional to 15,790.79, 21,791.24 and 8,717.16 is: 12,029.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.79 : 21,791.24 = 8,717.16 : x
  2. Step 2: Convert to fraction form
    15,790.79/21,791.24 = 8,717.16/x
  3. Step 3: Cross multiply
    15,790.79x = 21,791.24 × 8,717.16
  4. Step 4: Simplify right side
    15,790.79x = 189,957,682.09
  5. Step 5: Solve for x
    x = 189,957,682.09/15,790.79
  6. Step 6: Final answer
    x = 12,029.65

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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.