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Finding the Fourth Proportional to 13,531.22, 18,672.95 and 7,481.87

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Solution

The fourth proportional to 13,531.22, 18,672.95 and 7,481.87 is: 10,324.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,531.22 : 18,672.95 = 7,481.87 : x
  2. Step 2: Convert to fraction form
    13,531.22/18,672.95 = 7,481.87/x
  3. Step 3: Cross multiply
    13,531.22x = 18,672.95 × 7,481.87
  4. Step 4: Simplify right side
    13,531.22x = 139,708,509.76
  5. Step 5: Solve for x
    x = 139,708,509.76/13,531.22
  6. Step 6: Final answer
    x = 10,324.91

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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.