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Finding the Fourth Proportional to 18,831.69, 28,233.09 and 11,434.10

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Solution

The fourth proportional to 18,831.69, 28,233.09 and 11,434.10 is: 17,142.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.69 : 28,233.09 = 11,434.10 : x
  2. Step 2: Convert to fraction form
    18,831.69/28,233.09 = 11,434.10/x
  3. Step 3: Cross multiply
    18,831.69x = 28,233.09 × 11,434.10
  4. Step 4: Simplify right side
    18,831.69x = 322,819,833.20
  5. Step 5: Solve for x
    x = 322,819,833.20/18,831.69
  6. Step 6: Final answer
    x = 17,142.37

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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.