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Finding the Fourth Proportional to 18,647.87, 25,733.66 and 10,149.80

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Solution

The fourth proportional to 18,647.87, 25,733.66 and 10,149.80 is: 14,006.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.87 : 25,733.66 = 10,149.80 : x
  2. Step 2: Convert to fraction form
    18,647.87/25,733.66 = 10,149.80/x
  3. Step 3: Cross multiply
    18,647.87x = 25,733.66 × 10,149.80
  4. Step 4: Simplify right side
    18,647.87x = 261,191,451.52
  5. Step 5: Solve for x
    x = 261,191,451.52/18,647.87
  6. Step 6: Final answer
    x = 14,006.50

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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.