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Finding the Fourth Proportional to 18,363.92, 25,349.98 and 12,403.68

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Solution

The fourth proportional to 18,363.92, 25,349.98 and 12,403.68 is: 17,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.92 : 25,349.98 = 12,403.68 : x
  2. Step 2: Convert to fraction form
    18,363.92/25,349.98 = 12,403.68/x
  3. Step 3: Cross multiply
    18,363.92x = 25,349.98 × 12,403.68
  4. Step 4: Simplify right side
    18,363.92x = 314,433,039.93
  5. Step 5: Solve for x
    x = 314,433,039.93/18,363.92
  6. Step 6: Final answer
    x = 17,122.33

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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.