Home / 12,142.32-18,122.82-11,847.12

Finding the Fourth Proportional to 12,142.32, 18,122.82 and 11,847.12

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Solution

The fourth proportional to 12,142.32, 18,122.82 and 11,847.12 is: 17,682.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.32 : 18,122.82 = 11,847.12 : x
  2. Step 2: Convert to fraction form
    12,142.32/18,122.82 = 11,847.12/x
  3. Step 3: Cross multiply
    12,142.32x = 18,122.82 × 11,847.12
  4. Step 4: Simplify right side
    12,142.32x = 214,703,223.28
  5. Step 5: Solve for x
    x = 214,703,223.28/12,142.32
  6. Step 6: Final answer
    x = 17,682.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.