Home / 21,890.58-30,182.66-15,181.98

Finding the Fourth Proportional to 21,890.58, 30,182.66 and 15,181.98

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Solution

The fourth proportional to 21,890.58, 30,182.66 and 15,181.98 is: 20,932.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.58 : 30,182.66 = 15,181.98 : x
  2. Step 2: Convert to fraction form
    21,890.58/30,182.66 = 15,181.98/x
  3. Step 3: Cross multiply
    21,890.58x = 30,182.66 × 15,181.98
  4. Step 4: Simplify right side
    21,890.58x = 458,232,540.47
  5. Step 5: Solve for x
    x = 458,232,540.47/21,890.58
  6. Step 6: Final answer
    x = 20,932.86

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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.