Home / 19,942.20-27,520.56-10,989.57

Finding the Fourth Proportional to 19,942.20, 27,520.56 and 10,989.57

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Solution

The fourth proportional to 19,942.20, 27,520.56 and 10,989.57 is: 15,165.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,942.20 : 27,520.56 = 10,989.57 : x
  2. Step 2: Convert to fraction form
    19,942.20/27,520.56 = 10,989.57/x
  3. Step 3: Cross multiply
    19,942.20x = 27,520.56 × 10,989.57
  4. Step 4: Simplify right side
    19,942.20x = 302,439,223.76
  5. Step 5: Solve for x
    x = 302,439,223.76/19,942.20
  6. Step 6: Final answer
    x = 15,165.79

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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.