Home / 12,215.84-18,317.20-3,893.60

Finding the Fourth Proportional to 12,215.84, 18,317.20 and 3,893.60

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Solution

The fourth proportional to 12,215.84, 18,317.20 and 3,893.60 is: 5,838.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.84 : 18,317.20 = 3,893.60 : x
  2. Step 2: Convert to fraction form
    12,215.84/18,317.20 = 3,893.60/x
  3. Step 3: Cross multiply
    12,215.84x = 18,317.20 × 3,893.60
  4. Step 4: Simplify right side
    12,215.84x = 71,319,849.92
  5. Step 5: Solve for x
    x = 71,319,849.92/12,215.84
  6. Step 6: Final answer
    x = 5,838.31

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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.