Home / 21,940.50-30,282.76-15,144.06

Finding the Fourth Proportional to 21,940.50, 30,282.76 and 15,144.06

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Solution

The fourth proportional to 21,940.50, 30,282.76 and 15,144.06 is: 20,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.50 : 30,282.76 = 15,144.06 : x
  2. Step 2: Convert to fraction form
    21,940.50/30,282.76 = 15,144.06/x
  3. Step 3: Cross multiply
    21,940.50x = 30,282.76 × 15,144.06
  4. Step 4: Simplify right side
    21,940.50x = 458,603,934.41
  5. Step 5: Solve for x
    x = 458,603,934.41/21,940.50
  6. Step 6: Final answer
    x = 20,902.16

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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.