Home / 39,820.07-54,952.09-21,915.50

Finding the Fourth Proportional to 39,820.07, 54,952.09 and 21,915.50

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Solution

The fourth proportional to 39,820.07, 54,952.09 and 21,915.50 is: 30,243.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,820.07 : 54,952.09 = 21,915.50 : x
  2. Step 2: Convert to fraction form
    39,820.07/54,952.09 = 21,915.50/x
  3. Step 3: Cross multiply
    39,820.07x = 54,952.09 × 21,915.50
  4. Step 4: Simplify right side
    39,820.07x = 1,204,302,198.85
  5. Step 5: Solve for x
    x = 1,204,302,198.85/39,820.07
  6. Step 6: Final answer
    x = 30,243.60

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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.