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Finding the Fourth Proportional to 18,672.48, 25,769.29 and 11,407.68

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Solution

The fourth proportional to 18,672.48, 25,769.29 and 11,407.68 is: 15,743.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.48 : 25,769.29 = 11,407.68 : x
  2. Step 2: Convert to fraction form
    18,672.48/25,769.29 = 11,407.68/x
  3. Step 3: Cross multiply
    18,672.48x = 25,769.29 × 11,407.68
  4. Step 4: Simplify right side
    18,672.48x = 293,967,731.77
  5. Step 5: Solve for x
    x = 293,967,731.77/18,672.48
  6. Step 6: Final answer
    x = 15,743.37

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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.