Home / 20,899.80-31,349.82-5,317.48

Finding the Fourth Proportional to 20,899.80, 31,349.82 and 5,317.48

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Solution

The fourth proportional to 20,899.80, 31,349.82 and 5,317.48 is: 7,976.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.80 : 31,349.82 = 5,317.48 : x
  2. Step 2: Convert to fraction form
    20,899.80/31,349.82 = 5,317.48/x
  3. Step 3: Cross multiply
    20,899.80x = 31,349.82 × 5,317.48
  4. Step 4: Simplify right side
    20,899.80x = 166,702,040.85
  5. Step 5: Solve for x
    x = 166,702,040.85/20,899.80
  6. Step 6: Final answer
    x = 7,976.25

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1.5x scale

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.