Home / 28,343.36-39,167.79-21,257.48

Finding the Fourth Proportional to 28,343.36, 39,167.79 and 21,257.48

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Solution

The fourth proportional to 28,343.36, 39,167.79 and 21,257.48 is: 29,375.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.36 : 39,167.79 = 21,257.48 : x
  2. Step 2: Convert to fraction form
    28,343.36/39,167.79 = 21,257.48/x
  3. Step 3: Cross multiply
    28,343.36x = 39,167.79 × 21,257.48
  4. Step 4: Simplify right side
    28,343.36x = 832,608,530.77
  5. Step 5: Solve for x
    x = 832,608,530.77/28,343.36
  6. Step 6: Final answer
    x = 29,375.79

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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.