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Finding the Fourth Proportional to 18,608.72, 25,669.32 and 11,152.40

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Solution

The fourth proportional to 18,608.72, 25,669.32 and 11,152.40 is: 15,383.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.72 : 25,669.32 = 11,152.40 : x
  2. Step 2: Convert to fraction form
    18,608.72/25,669.32 = 11,152.40/x
  3. Step 3: Cross multiply
    18,608.72x = 25,669.32 × 11,152.40
  4. Step 4: Simplify right side
    18,608.72x = 286,274,524.37
  5. Step 5: Solve for x
    x = 286,274,524.37/18,608.72
  6. Step 6: Final answer
    x = 15,383.89

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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.