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Finding the Fourth Proportional to 15,025.84, 20,739.82 and 8,739.42

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Solution

The fourth proportional to 15,025.84, 20,739.82 and 8,739.42 is: 12,062.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.84 : 20,739.82 = 8,739.42 : x
  2. Step 2: Convert to fraction form
    15,025.84/20,739.82 = 8,739.42/x
  3. Step 3: Cross multiply
    15,025.84x = 20,739.82 × 8,739.42
  4. Step 4: Simplify right side
    15,025.84x = 181,253,997.70
  5. Step 5: Solve for x
    x = 181,253,997.70/15,025.84
  6. Step 6: Final answer
    x = 12,062.82

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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.