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Finding the Fourth Proportional to 18,991.71, 26,200.05 and 11,029.62

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Solution

The fourth proportional to 18,991.71, 26,200.05 and 11,029.62 is: 15,215.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.71 : 26,200.05 = 11,029.62 : x
  2. Step 2: Convert to fraction form
    18,991.71/26,200.05 = 11,029.62/x
  3. Step 3: Cross multiply
    18,991.71x = 26,200.05 × 11,029.62
  4. Step 4: Simplify right side
    18,991.71x = 288,976,595.48
  5. Step 5: Solve for x
    x = 288,976,595.48/18,991.71
  6. Step 6: Final answer
    x = 15,215.93

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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.