Home / 8,142.48-12,214.62-3,215.52

Finding the Fourth Proportional to 8,142.48, 12,214.62 and 3,215.52

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Solution

The fourth proportional to 8,142.48, 12,214.62 and 3,215.52 is: 4,823.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.48 : 12,214.62 = 3,215.52 : x
  2. Step 2: Convert to fraction form
    8,142.48/12,214.62 = 3,215.52/x
  3. Step 3: Cross multiply
    8,142.48x = 12,214.62 × 3,215.52
  4. Step 4: Simplify right side
    8,142.48x = 39,276,354.90
  5. Step 5: Solve for x
    x = 39,276,354.90/8,142.48
  6. Step 6: Final answer
    x = 4,823.64

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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.