Home / 21,933.61-30,255.39-13,439.54

Finding the Fourth Proportional to 21,933.61, 30,255.39 and 13,439.54

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Solution

The fourth proportional to 21,933.61, 30,255.39 and 13,439.54 is: 18,538.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,933.61 : 30,255.39 = 13,439.54 : x
  2. Step 2: Convert to fraction form
    21,933.61/30,255.39 = 13,439.54/x
  3. Step 3: Cross multiply
    21,933.61x = 30,255.39 × 13,439.54
  4. Step 4: Simplify right side
    21,933.61x = 406,618,599.76
  5. Step 5: Solve for x
    x = 406,618,599.76/21,933.61
  6. Step 6: Final answer
    x = 18,538.61

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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.