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Finding the Fourth Proportional to 18,191, 25,108.08 and 11,123.40

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Solution

The fourth proportional to 18,191, 25,108.08 and 11,123.40 is: 15,353.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191 : 25,108.08 = 11,123.40 : x
  2. Step 2: Convert to fraction form
    18,191/25,108.08 = 11,123.40/x
  3. Step 3: Cross multiply
    18,191x = 25,108.08 × 11,123.40
  4. Step 4: Simplify right side
    18,191x = 279,287,217.07
  5. Step 5: Solve for x
    x = 279,287,217.07/18,191
  6. Step 6: Final answer
    x = 15,353.04

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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.