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Finding the Fourth Proportional to 18,403.79, 25,220.25 and 16,632.32

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Solution

The fourth proportional to 18,403.79, 25,220.25 and 16,632.32 is: 22,792.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.79 : 25,220.25 = 16,632.32 : x
  2. Step 2: Convert to fraction form
    18,403.79/25,220.25 = 16,632.32/x
  3. Step 3: Cross multiply
    18,403.79x = 25,220.25 × 16,632.32
  4. Step 4: Simplify right side
    18,403.79x = 419,471,142.38
  5. Step 5: Solve for x
    x = 419,471,142.38/18,403.79
  6. Step 6: Final answer
    x = 22,792.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.