Home / 12,005.82-18,042.75-7,077.78

Finding the Fourth Proportional to 12,005.82, 18,042.75 and 7,077.78

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Solution

The fourth proportional to 12,005.82, 18,042.75 and 7,077.78 is: 10,636.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.82 : 18,042.75 = 7,077.78 : x
  2. Step 2: Convert to fraction form
    12,005.82/18,042.75 = 7,077.78/x
  3. Step 3: Cross multiply
    12,005.82x = 18,042.75 × 7,077.78
  4. Step 4: Simplify right side
    12,005.82x = 127,702,615.10
  5. Step 5: Solve for x
    x = 127,702,615.10/12,005.82
  6. Step 6: Final answer
    x = 10,636.73

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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.