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Finding the Fourth Proportional to 13,908.87, 20,739.24 and 12,363.39

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Solution

The fourth proportional to 13,908.87, 20,739.24 and 12,363.39 is: 18,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.87 : 20,739.24 = 12,363.39 : x
  2. Step 2: Convert to fraction form
    13,908.87/20,739.24 = 12,363.39/x
  3. Step 3: Cross multiply
    13,908.87x = 20,739.24 × 12,363.39
  4. Step 4: Simplify right side
    13,908.87x = 256,407,250.61
  5. Step 5: Solve for x
    x = 256,407,250.61/13,908.87
  6. Step 6: Final answer
    x = 18,434.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.