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Finding the Fourth Proportional to 18,656.76, 25,745.69 and 10,158.75

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Solution

The fourth proportional to 18,656.76, 25,745.69 and 10,158.75 is: 14,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.76 : 25,745.69 = 10,158.75 : x
  2. Step 2: Convert to fraction form
    18,656.76/25,745.69 = 10,158.75/x
  3. Step 3: Cross multiply
    18,656.76x = 25,745.69 × 10,158.75
  4. Step 4: Simplify right side
    18,656.76x = 261,543,996.54
  5. Step 5: Solve for x
    x = 261,543,996.54/18,656.76
  6. Step 6: Final answer
    x = 14,018.72

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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.