Home / 12,976.92-17,887.11-10,139.34

Finding the Fourth Proportional to 12,976.92, 17,887.11 and 10,139.34

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Solution

The fourth proportional to 12,976.92, 17,887.11 and 10,139.34 is: 13,975.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,976.92 : 17,887.11 = 10,139.34 : x
  2. Step 2: Convert to fraction form
    12,976.92/17,887.11 = 10,139.34/x
  3. Step 3: Cross multiply
    12,976.92x = 17,887.11 × 10,139.34
  4. Step 4: Simplify right side
    12,976.92x = 181,363,489.91
  5. Step 5: Solve for x
    x = 181,363,489.91/12,976.92
  6. Step 6: Final answer
    x = 13,975.86

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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.