Home / 21,975.50-30,330.09-21,246.38

Finding the Fourth Proportional to 21,975.50, 30,330.09 and 21,246.38

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Solution

The fourth proportional to 21,975.50, 30,330.09 and 21,246.38 is: 29,323.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.50 : 30,330.09 = 21,246.38 : x
  2. Step 2: Convert to fraction form
    21,975.50/30,330.09 = 21,246.38/x
  3. Step 3: Cross multiply
    21,975.50x = 30,330.09 × 21,246.38
  4. Step 4: Simplify right side
    21,975.50x = 644,404,617.57
  5. Step 5: Solve for x
    x = 644,404,617.57/21,975.50
  6. Step 6: Final answer
    x = 29,323.78

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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.