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Finding the Fourth Proportional to 18,775.76, 25,910.76 and 10,278.05

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Solution

The fourth proportional to 18,775.76, 25,910.76 and 10,278.05 is: 14,183.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.76 : 25,910.76 = 10,278.05 : x
  2. Step 2: Convert to fraction form
    18,775.76/25,910.76 = 10,278.05/x
  3. Step 3: Cross multiply
    18,775.76x = 25,910.76 × 10,278.05
  4. Step 4: Simplify right side
    18,775.76x = 266,312,151.59
  5. Step 5: Solve for x
    x = 266,312,151.59/18,775.76
  6. Step 6: Final answer
    x = 14,183.83

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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.