Home / 8,215.35-11,337.75-5,231.31

Finding the Fourth Proportional to 8,215.35, 11,337.75 and 5,231.31

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Solution

The fourth proportional to 8,215.35, 11,337.75 and 5,231.31 is: 7,219.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.35 : 11,337.75 = 5,231.31 : x
  2. Step 2: Convert to fraction form
    8,215.35/11,337.75 = 5,231.31/x
  3. Step 3: Cross multiply
    8,215.35x = 11,337.75 × 5,231.31
  4. Step 4: Simplify right side
    8,215.35x = 59,311,284.95
  5. Step 5: Solve for x
    x = 59,311,284.95/8,215.35
  6. Step 6: Final answer
    x = 7,219.57

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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.