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Finding the Fourth Proportional to 13,676.40, 18,873.43 and 7,388.78

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Solution

The fourth proportional to 13,676.40, 18,873.43 and 7,388.78 is: 10,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,676.40 : 18,873.43 = 7,388.78 : x
  2. Step 2: Convert to fraction form
    13,676.40/18,873.43 = 7,388.78/x
  3. Step 3: Cross multiply
    13,676.40x = 18,873.43 × 7,388.78
  4. Step 4: Simplify right side
    13,676.40x = 139,451,509.28
  5. Step 5: Solve for x
    x = 139,451,509.28/13,676.40
  6. Step 6: Final answer
    x = 10,196.51

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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.