Home / 21,947.20-30,286.93-11,875.42

Finding the Fourth Proportional to 21,947.20, 30,286.93 and 11,875.42

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Solution

The fourth proportional to 21,947.20, 30,286.93 and 11,875.42 is: 16,387.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.20 : 30,286.93 = 11,875.42 : x
  2. Step 2: Convert to fraction form
    21,947.20/30,286.93 = 11,875.42/x
  3. Step 3: Cross multiply
    21,947.20x = 30,286.93 × 11,875.42
  4. Step 4: Simplify right side
    21,947.20x = 359,669,954.88
  5. Step 5: Solve for x
    x = 359,669,954.88/21,947.20
  6. Step 6: Final answer
    x = 16,387.97

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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.