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Finding the Fourth Proportional to 18,921.11, 26,110.91 and 10,423.08

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Solution

The fourth proportional to 18,921.11, 26,110.91 and 10,423.08 is: 14,383.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.11 : 26,110.91 = 10,423.08 : x
  2. Step 2: Convert to fraction form
    18,921.11/26,110.91 = 10,423.08/x
  3. Step 3: Cross multiply
    18,921.11x = 26,110.91 × 10,423.08
  4. Step 4: Simplify right side
    18,921.11x = 272,156,103.80
  5. Step 5: Solve for x
    x = 272,156,103.80/18,921.11
  6. Step 6: Final answer
    x = 14,383.73

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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.