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Finding the Fourth Proportional to 18,589.78, 27,750.95 and 15,928.63

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Solution

The fourth proportional to 18,589.78, 27,750.95 and 15,928.63 is: 23,778.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,589.78 : 27,750.95 = 15,928.63 : x
  2. Step 2: Convert to fraction form
    18,589.78/27,750.95 = 15,928.63/x
  3. Step 3: Cross multiply
    18,589.78x = 27,750.95 × 15,928.63
  4. Step 4: Simplify right side
    18,589.78x = 442,034,614.70
  5. Step 5: Solve for x
    x = 442,034,614.70/18,589.78
  6. Step 6: Final answer
    x = 23,778.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.