Home / 27,991.60-38,589.70-20,019.92

Finding the Fourth Proportional to 27,991.60, 38,589.70 and 20,019.92

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Solution

The fourth proportional to 27,991.60, 38,589.70 and 20,019.92 is: 27,599.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.60 : 38,589.70 = 20,019.92 : x
  2. Step 2: Convert to fraction form
    27,991.60/38,589.70 = 20,019.92/x
  3. Step 3: Cross multiply
    27,991.60x = 38,589.70 × 20,019.92
  4. Step 4: Simplify right side
    27,991.60x = 772,562,706.82
  5. Step 5: Solve for x
    x = 772,562,706.82/27,991.60
  6. Step 6: Final answer
    x = 27,599.81

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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.