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Finding the Fourth Proportional to 18,449.87, 27,681.28 and 15,697.49

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Solution

The fourth proportional to 18,449.87, 27,681.28 and 15,697.49 is: 23,551.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,449.87 : 27,681.28 = 15,697.49 : x
  2. Step 2: Convert to fraction form
    18,449.87/27,681.28 = 15,697.49/x
  3. Step 3: Cross multiply
    18,449.87x = 27,681.28 × 15,697.49
  4. Step 4: Simplify right side
    18,449.87x = 434,526,438.34
  5. Step 5: Solve for x
    x = 434,526,438.34/18,449.87
  6. Step 6: Final answer
    x = 23,551.74

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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.