Home / 12,270.85-18,390.81-6,648.28

Finding the Fourth Proportional to 12,270.85, 18,390.81 and 6,648.28

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Solution

The fourth proportional to 12,270.85, 18,390.81 and 6,648.28 is: 9,964.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,270.85 : 18,390.81 = 6,648.28 : x
  2. Step 2: Convert to fraction form
    12,270.85/18,390.81 = 6,648.28/x
  3. Step 3: Cross multiply
    12,270.85x = 18,390.81 × 6,648.28
  4. Step 4: Simplify right side
    12,270.85x = 122,267,162.35
  5. Step 5: Solve for x
    x = 122,267,162.35/12,270.85
  6. Step 6: Final answer
    x = 9,964.04

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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.