Home / 28,365.82-39,144.50-15,618.74

Finding the Fourth Proportional to 28,365.82, 39,144.50 and 15,618.74

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Solution

The fourth proportional to 28,365.82, 39,144.50 and 15,618.74 is: 21,553.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.82 : 39,144.50 = 15,618.74 : x
  2. Step 2: Convert to fraction form
    28,365.82/39,144.50 = 15,618.74/x
  3. Step 3: Cross multiply
    28,365.82x = 39,144.50 × 15,618.74
  4. Step 4: Simplify right side
    28,365.82x = 611,387,767.93
  5. Step 5: Solve for x
    x = 611,387,767.93/28,365.82
  6. Step 6: Final answer
    x = 21,553.68

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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.