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Finding the Fourth Proportional to 18,985.61, 26,195.67 and 11,023.11

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Solution

The fourth proportional to 18,985.61, 26,195.67 and 11,023.11 is: 15,209.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.61 : 26,195.67 = 11,023.11 : x
  2. Step 2: Convert to fraction form
    18,985.61/26,195.67 = 11,023.11/x
  3. Step 3: Cross multiply
    18,985.61x = 26,195.67 × 11,023.11
  4. Step 4: Simplify right side
    18,985.61x = 288,757,751.93
  5. Step 5: Solve for x
    x = 288,757,751.93/18,985.61
  6. Step 6: Final answer
    x = 15,209.29

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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.