Home / 8,127.78-11,205.21-5,142.12

Finding the Fourth Proportional to 8,127.78, 11,205.21 and 5,142.12

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Solution

The fourth proportional to 8,127.78, 11,205.21 and 5,142.12 is: 7,089.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,127.78 : 11,205.21 = 5,142.12 : x
  2. Step 2: Convert to fraction form
    8,127.78/11,205.21 = 5,142.12/x
  3. Step 3: Cross multiply
    8,127.78x = 11,205.21 × 5,142.12
  4. Step 4: Simplify right side
    8,127.78x = 57,618,534.45
  5. Step 5: Solve for x
    x = 57,618,534.45/8,127.78
  6. Step 6: Final answer
    x = 7,089.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.