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Finding the Fourth Proportional to 12,371.72, 18,556.10 and 3,487.72

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Solution

The fourth proportional to 12,371.72, 18,556.10 and 3,487.72 is: 5,231.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,371.72 : 18,556.10 = 3,487.72 : x
  2. Step 2: Convert to fraction form
    12,371.72/18,556.10 = 3,487.72/x
  3. Step 3: Cross multiply
    12,371.72x = 18,556.10 × 3,487.72
  4. Step 4: Simplify right side
    12,371.72x = 64,718,417.26
  5. Step 5: Solve for x
    x = 64,718,417.26/12,371.72
  6. Step 6: Final answer
    x = 5,231.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.