Home / 21,981.35-30,334.25-11,909.85

Finding the Fourth Proportional to 21,981.35, 30,334.25 and 11,909.85

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Solution

The fourth proportional to 21,981.35, 30,334.25 and 11,909.85 is: 16,435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.35 : 30,334.25 = 11,909.85 : x
  2. Step 2: Convert to fraction form
    21,981.35/30,334.25 = 11,909.85/x
  3. Step 3: Cross multiply
    21,981.35x = 30,334.25 × 11,909.85
  4. Step 4: Simplify right side
    21,981.35x = 361,276,307.81
  5. Step 5: Solve for x
    x = 361,276,307.81/21,981.35
  6. Step 6: Final answer
    x = 16,435.59

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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.