Home / 21,940.46-30,275.78-13,438.70

Finding the Fourth Proportional to 21,940.46, 30,275.78 and 13,438.70

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Solution

The fourth proportional to 21,940.46, 30,275.78 and 13,438.70 is: 18,544.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.46 : 30,275.78 = 13,438.70 : x
  2. Step 2: Convert to fraction form
    21,940.46/30,275.78 = 13,438.70/x
  3. Step 3: Cross multiply
    21,940.46x = 30,275.78 × 13,438.70
  4. Step 4: Simplify right side
    21,940.46x = 406,867,124.69
  5. Step 5: Solve for x
    x = 406,867,124.69/21,940.46
  6. Step 6: Final answer
    x = 18,544.15

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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.