Home / 28,529.78-39,367.68-15,781.24

Finding the Fourth Proportional to 28,529.78, 39,367.68 and 15,781.24

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Solution

The fourth proportional to 28,529.78, 39,367.68 and 15,781.24 is: 21,776.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.78 : 39,367.68 = 15,781.24 : x
  2. Step 2: Convert to fraction form
    28,529.78/39,367.68 = 15,781.24/x
  3. Step 3: Cross multiply
    28,529.78x = 39,367.68 × 15,781.24
  4. Step 4: Simplify right side
    28,529.78x = 621,270,806.32
  5. Step 5: Solve for x
    x = 621,270,806.32/28,529.78
  6. Step 6: Final answer
    x = 21,776.22

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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.