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Finding the Fourth Proportional to 18,672.72, 25,769.63 and 11,407.93

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Solution

The fourth proportional to 18,672.72, 25,769.63 and 11,407.93 is: 15,743.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.72 : 25,769.63 = 11,407.93 : x
  2. Step 2: Convert to fraction form
    18,672.72/25,769.63 = 11,407.93/x
  3. Step 3: Cross multiply
    18,672.72x = 25,769.63 × 11,407.93
  4. Step 4: Simplify right side
    18,672.72x = 293,978,099.26
  5. Step 5: Solve for x
    x = 293,978,099.26/18,672.72
  6. Step 6: Final answer
    x = 15,743.72

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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.