Home / 20,905.16-28,850.62-11,952.43

Finding the Fourth Proportional to 20,905.16, 28,850.62 and 11,952.43

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Solution

The fourth proportional to 20,905.16, 28,850.62 and 11,952.43 is: 16,495.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.16 : 28,850.62 = 11,952.43 : x
  2. Step 2: Convert to fraction form
    20,905.16/28,850.62 = 11,952.43/x
  3. Step 3: Cross multiply
    20,905.16x = 28,850.62 × 11,952.43
  4. Step 4: Simplify right side
    20,905.16x = 344,835,016.01
  5. Step 5: Solve for x
    x = 344,835,016.01/20,905.16
  6. Step 6: Final answer
    x = 16,495.21

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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.