Home / 21,981.04-30,333.78-11,909.75

Finding the Fourth Proportional to 21,981.04, 30,333.78 and 11,909.75

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Solution

The fourth proportional to 21,981.04, 30,333.78 and 11,909.75 is: 16,435.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.04 : 30,333.78 = 11,909.75 : x
  2. Step 2: Convert to fraction form
    21,981.04/30,333.78 = 11,909.75/x
  3. Step 3: Cross multiply
    21,981.04x = 30,333.78 × 11,909.75
  4. Step 4: Simplify right side
    21,981.04x = 361,267,584.69
  5. Step 5: Solve for x
    x = 361,267,584.69/21,981.04
  6. Step 6: Final answer
    x = 16,435.42

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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.