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Finding the Fourth Proportional to 18,510.42, 27,776.49 and 6,831.78

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Solution

The fourth proportional to 18,510.42, 27,776.49 and 6,831.78 is: 10,251.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,510.42 : 27,776.49 = 6,831.78 : x
  2. Step 2: Convert to fraction form
    18,510.42/27,776.49 = 6,831.78/x
  3. Step 3: Cross multiply
    18,510.42x = 27,776.49 × 6,831.78
  4. Step 4: Simplify right side
    18,510.42x = 189,762,868.85
  5. Step 5: Solve for x
    x = 189,762,868.85/18,510.42
  6. Step 6: Final answer
    x = 10,251.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.