Home / 15,790.41-21,789.61-8,717.29

Finding the Fourth Proportional to 15,790.41, 21,789.61 and 8,717.29

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Solution

The fourth proportional to 15,790.41, 21,789.61 and 8,717.29 is: 12,029.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.41 : 21,789.61 = 8,717.29 : x
  2. Step 2: Convert to fraction form
    15,790.41/21,789.61 = 8,717.29/x
  3. Step 3: Cross multiply
    15,790.41x = 21,789.61 × 8,717.29
  4. Step 4: Simplify right side
    15,790.41x = 189,946,273.09
  5. Step 5: Solve for x
    x = 189,946,273.09/15,790.41
  6. Step 6: Final answer
    x = 12,029.22

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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.