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Finding the Fourth Proportional to 18,301.29, 25,255.76 and 9,917.79

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Solution

The fourth proportional to 18,301.29, 25,255.76 and 9,917.79 is: 13,686.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,301.29 : 25,255.76 = 9,917.79 : x
  2. Step 2: Convert to fraction form
    18,301.29/25,255.76 = 9,917.79/x
  3. Step 3: Cross multiply
    18,301.29x = 25,255.76 × 9,917.79
  4. Step 4: Simplify right side
    18,301.29x = 250,481,274.38
  5. Step 5: Solve for x
    x = 250,481,274.38/18,301.29
  6. Step 6: Final answer
    x = 13,686.54

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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.