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Finding the Fourth Proportional to 13,456.40, 18,568.44 and 7,487.42

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Solution

The fourth proportional to 13,456.40, 18,568.44 and 7,487.42 is: 10,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.40 : 18,568.44 = 7,487.42 : x
  2. Step 2: Convert to fraction form
    13,456.40/18,568.44 = 7,487.42/x
  3. Step 3: Cross multiply
    13,456.40x = 18,568.44 × 7,487.42
  4. Step 4: Simplify right side
    13,456.40x = 139,029,616.18
  5. Step 5: Solve for x
    x = 139,029,616.18/13,456.40
  6. Step 6: Final answer
    x = 10,331.86

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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.