Home / 20,945.12-31,415.12-7,794

Finding the Fourth Proportional to 20,945.12, 31,415.12 and 7,794

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Solution

The fourth proportional to 20,945.12, 31,415.12 and 7,794 is: 11,690.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.12 : 31,415.12 = 7,794 : x
  2. Step 2: Convert to fraction form
    20,945.12/31,415.12 = 7,794/x
  3. Step 3: Cross multiply
    20,945.12x = 31,415.12 × 7,794
  4. Step 4: Simplify right side
    20,945.12x = 244,849,445.28
  5. Step 5: Solve for x
    x = 244,849,445.28/20,945.12
  6. Step 6: Final answer
    x = 11,690.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.