Home / 21,909.81-30,235.54-11,838.26

Finding the Fourth Proportional to 21,909.81, 30,235.54 and 11,838.26

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Solution

The fourth proportional to 21,909.81, 30,235.54 and 11,838.26 is: 16,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.81 : 30,235.54 = 11,838.26 : x
  2. Step 2: Convert to fraction form
    21,909.81/30,235.54 = 11,838.26/x
  3. Step 3: Cross multiply
    21,909.81x = 30,235.54 × 11,838.26
  4. Step 4: Simplify right side
    21,909.81x = 357,936,183.76
  5. Step 5: Solve for x
    x = 357,936,183.76/21,909.81
  6. Step 6: Final answer
    x = 16,336.80

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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.