Home / 19,942.20-27,520.55-10,989.61

Finding the Fourth Proportional to 19,942.20, 27,520.55 and 10,989.61

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Solution

The fourth proportional to 19,942.20, 27,520.55 and 10,989.61 is: 15,165.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,942.20 : 27,520.55 = 10,989.61 : x
  2. Step 2: Convert to fraction form
    19,942.20/27,520.55 = 10,989.61/x
  3. Step 3: Cross multiply
    19,942.20x = 27,520.55 × 10,989.61
  4. Step 4: Simplify right side
    19,942.20x = 302,440,111.49
  5. Step 5: Solve for x
    x = 302,440,111.49/19,942.20
  6. Step 6: Final answer
    x = 15,165.83

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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.