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Finding the Fourth Proportional to 7,138.89, 10,708.92 and 1,873.89

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Solution

The fourth proportional to 7,138.89, 10,708.92 and 1,873.89 is: 2,810.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.89 : 10,708.92 = 1,873.89 : x
  2. Step 2: Convert to fraction form
    7,138.89/10,708.92 = 1,873.89/x
  3. Step 3: Cross multiply
    7,138.89x = 10,708.92 × 1,873.89
  4. Step 4: Simplify right side
    7,138.89x = 20,067,338.10
  5. Step 5: Solve for x
    x = 20,067,338.10/7,138.89
  6. Step 6: Final answer
    x = 2,810.99

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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.