Home / 13,658.40-18,837.36-8,064

Finding the Fourth Proportional to 13,658.40, 18,837.36 and 8,064

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Solution

The fourth proportional to 13,658.40, 18,837.36 and 8,064 is: 11,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.40 : 18,837.36 = 8,064 : x
  2. Step 2: Convert to fraction form
    13,658.40/18,837.36 = 8,064/x
  3. Step 3: Cross multiply
    13,658.40x = 18,837.36 × 8,064
  4. Step 4: Simplify right side
    13,658.40x = 151,904,471.04
  5. Step 5: Solve for x
    x = 151,904,471.04/13,658.40
  6. Step 6: Final answer
    x = 11,121.69

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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.