Home / 28,365.57-39,144.16-15,618.49

Finding the Fourth Proportional to 28,365.57, 39,144.16 and 15,618.49

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Solution

The fourth proportional to 28,365.57, 39,144.16 and 15,618.49 is: 21,553.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.57 : 39,144.16 = 15,618.49 : x
  2. Step 2: Convert to fraction form
    28,365.57/39,144.16 = 15,618.49/x
  3. Step 3: Cross multiply
    28,365.57x = 39,144.16 × 15,618.49
  4. Step 4: Simplify right side
    28,365.57x = 611,372,534.61
  5. Step 5: Solve for x
    x = 611,372,534.61/28,365.57
  6. Step 6: Final answer
    x = 21,553.33

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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.