Home / 21,909.96-30,235.71-11,838.39

Finding the Fourth Proportional to 21,909.96, 30,235.71 and 11,838.39

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Solution

The fourth proportional to 21,909.96, 30,235.71 and 11,838.39 is: 16,336.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.96 : 30,235.71 = 11,838.39 : x
  2. Step 2: Convert to fraction form
    21,909.96/30,235.71 = 11,838.39/x
  3. Step 3: Cross multiply
    21,909.96x = 30,235.71 × 11,838.39
  4. Step 4: Simplify right side
    21,909.96x = 357,942,126.91
  5. Step 5: Solve for x
    x = 357,942,126.91/21,909.96
  6. Step 6: Final answer
    x = 16,336.96

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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.