Home / 28,617.29-39,472.07-20,137.20

Finding the Fourth Proportional to 28,617.29, 39,472.07 and 20,137.20

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Solution

The fourth proportional to 28,617.29, 39,472.07 and 20,137.20 is: 27,775.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.29 : 39,472.07 = 20,137.20 : x
  2. Step 2: Convert to fraction form
    28,617.29/39,472.07 = 20,137.20/x
  3. Step 3: Cross multiply
    28,617.29x = 39,472.07 × 20,137.20
  4. Step 4: Simplify right side
    28,617.29x = 794,856,968.00
  5. Step 5: Solve for x
    x = 794,856,968.00/28,617.29
  6. Step 6: Final answer
    x = 27,775.41

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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.