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Finding the Fourth Proportional to 13,340.76, 18,410.21 and 7,372.41

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Solution

The fourth proportional to 13,340.76, 18,410.21 and 7,372.41 is: 10,173.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.76 : 18,410.21 = 7,372.41 : x
  2. Step 2: Convert to fraction form
    13,340.76/18,410.21 = 7,372.41/x
  3. Step 3: Cross multiply
    13,340.76x = 18,410.21 × 7,372.41
  4. Step 4: Simplify right side
    13,340.76x = 135,727,649.40
  5. Step 5: Solve for x
    x = 135,727,649.40/13,340.76
  6. Step 6: Final answer
    x = 10,173.91

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Half scale
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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.