Home / 12,003.90-18,005.85-6,156.78

Finding the Fourth Proportional to 12,003.90, 18,005.85 and 6,156.78

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Solution

The fourth proportional to 12,003.90, 18,005.85 and 6,156.78 is: 9,235.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.90 : 18,005.85 = 6,156.78 : x
  2. Step 2: Convert to fraction form
    12,003.90/18,005.85 = 6,156.78/x
  3. Step 3: Cross multiply
    12,003.90x = 18,005.85 × 6,156.78
  4. Step 4: Simplify right side
    12,003.90x = 110,858,057.16
  5. Step 5: Solve for x
    x = 110,858,057.16/12,003.90
  6. Step 6: Final answer
    x = 9,235.17

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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.