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Finding the Fourth Proportional to 18,988.66, 26,209.68 and 11,029.42

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Solution

The fourth proportional to 18,988.66, 26,209.68 and 11,029.42 is: 15,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.66 : 26,209.68 = 11,029.42 : x
  2. Step 2: Convert to fraction form
    18,988.66/26,209.68 = 11,029.42/x
  3. Step 3: Cross multiply
    18,988.66x = 26,209.68 × 11,029.42
  4. Step 4: Simplify right side
    18,988.66x = 289,077,568.79
  5. Step 5: Solve for x
    x = 289,077,568.79/18,988.66
  6. Step 6: Final answer
    x = 15,223.70

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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.