Home / 8,215.13-12,320.78-3,283.45

Finding the Fourth Proportional to 8,215.13, 12,320.78 and 3,283.45

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Solution

The fourth proportional to 8,215.13, 12,320.78 and 3,283.45 is: 4,924.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.13 : 12,320.78 = 3,283.45 : x
  2. Step 2: Convert to fraction form
    8,215.13/12,320.78 = 3,283.45/x
  3. Step 3: Cross multiply
    8,215.13x = 12,320.78 × 3,283.45
  4. Step 4: Simplify right side
    8,215.13x = 40,454,617.87
  5. Step 5: Solve for x
    x = 40,454,617.87/8,215.13
  6. Step 6: Final answer
    x = 4,924.40

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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.