Home / 20,850.12-28,772.91-11,897.10

Finding the Fourth Proportional to 20,850.12, 28,772.91 and 11,897.10

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Solution

The fourth proportional to 20,850.12, 28,772.91 and 11,897.10 is: 16,417.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.12 : 28,772.91 = 11,897.10 : x
  2. Step 2: Convert to fraction form
    20,850.12/28,772.91 = 11,897.10/x
  3. Step 3: Cross multiply
    20,850.12x = 28,772.91 × 11,897.10
  4. Step 4: Simplify right side
    20,850.12x = 342,314,187.56
  5. Step 5: Solve for x
    x = 342,314,187.56/20,850.12
  6. Step 6: Final answer
    x = 16,417.85

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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.