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Finding the Fourth Proportional to 8,139.89, 12,209.93 and 2,593.20

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Solution

The fourth proportional to 8,139.89, 12,209.93 and 2,593.20 is: 3,889.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.89 : 12,209.93 = 2,593.20 : x
  2. Step 2: Convert to fraction form
    8,139.89/12,209.93 = 2,593.20/x
  3. Step 3: Cross multiply
    8,139.89x = 12,209.93 × 2,593.20
  4. Step 4: Simplify right side
    8,139.89x = 31,662,777.51
  5. Step 5: Solve for x
    x = 31,662,777.51/8,139.89
  6. Step 6: Final answer
    x = 3,889.83

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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.