Home / 15,661.97-21,600.95-13,769.54

Finding the Fourth Proportional to 15,661.97, 21,600.95 and 13,769.54

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Solution

The fourth proportional to 15,661.97, 21,600.95 and 13,769.54 is: 18,990.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.97 : 21,600.95 = 13,769.54 : x
  2. Step 2: Convert to fraction form
    15,661.97/21,600.95 = 13,769.54/x
  3. Step 3: Cross multiply
    15,661.97x = 21,600.95 × 13,769.54
  4. Step 4: Simplify right side
    15,661.97x = 297,435,145.06
  5. Step 5: Solve for x
    x = 297,435,145.06/15,661.97
  6. Step 6: Final answer
    x = 18,990.92

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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.