Home / 39,831.75-54,971.48-21,930.39

Finding the Fourth Proportional to 39,831.75, 54,971.48 and 21,930.39

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Solution

The fourth proportional to 39,831.75, 54,971.48 and 21,930.39 is: 30,265.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,831.75 : 54,971.48 = 21,930.39 : x
  2. Step 2: Convert to fraction form
    39,831.75/54,971.48 = 21,930.39/x
  3. Step 3: Cross multiply
    39,831.75x = 54,971.48 × 21,930.39
  4. Step 4: Simplify right side
    39,831.75x = 1,205,545,885.63
  5. Step 5: Solve for x
    x = 1,205,545,885.63/39,831.75
  6. Step 6: Final answer
    x = 30,265.95

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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.