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Finding the Fourth Proportional to 18,294.55, 27,443.45 and 7,618.56

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Solution

The fourth proportional to 18,294.55, 27,443.45 and 7,618.56 is: 11,428.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,294.55 : 27,443.45 = 7,618.56 : x
  2. Step 2: Convert to fraction form
    18,294.55/27,443.45 = 7,618.56/x
  3. Step 3: Cross multiply
    18,294.55x = 27,443.45 × 7,618.56
  4. Step 4: Simplify right side
    18,294.55x = 209,079,570.43
  5. Step 5: Solve for x
    x = 209,079,570.43/18,294.55
  6. Step 6: Final answer
    x = 11,428.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.