Home / 13,642.40-18,815.28-8,048

Finding the Fourth Proportional to 13,642.40, 18,815.28 and 8,048

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Solution

The fourth proportional to 13,642.40, 18,815.28 and 8,048 is: 11,099.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.40 : 18,815.28 = 8,048 : x
  2. Step 2: Convert to fraction form
    13,642.40/18,815.28 = 8,048/x
  3. Step 3: Cross multiply
    13,642.40x = 18,815.28 × 8,048
  4. Step 4: Simplify right side
    13,642.40x = 151,425,373.44
  5. Step 5: Solve for x
    x = 151,425,373.44/13,642.40
  6. Step 6: Final answer
    x = 11,099.61

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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.