Home / 28,356.27-39,131.26-15,781.02

Finding the Fourth Proportional to 28,356.27, 39,131.26 and 15,781.02

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Solution

The fourth proportional to 28,356.27, 39,131.26 and 15,781.02 is: 21,777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.27 : 39,131.26 = 15,781.02 : x
  2. Step 2: Convert to fraction form
    28,356.27/39,131.26 = 15,781.02/x
  3. Step 3: Cross multiply
    28,356.27x = 39,131.26 × 15,781.02
  4. Step 4: Simplify right side
    28,356.27x = 617,531,196.69
  5. Step 5: Solve for x
    x = 617,531,196.69/28,356.27
  6. Step 6: Final answer
    x = 21,777.59

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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.