Home / 8,128.98-11,212.29-4,986.42

Finding the Fourth Proportional to 8,128.98, 11,212.29 and 4,986.42

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Solution

The fourth proportional to 8,128.98, 11,212.29 and 4,986.42 is: 6,877.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.98 : 11,212.29 = 4,986.42 : x
  2. Step 2: Convert to fraction form
    8,128.98/11,212.29 = 4,986.42/x
  3. Step 3: Cross multiply
    8,128.98x = 11,212.29 × 4,986.42
  4. Step 4: Simplify right side
    8,128.98x = 55,909,187.10
  5. Step 5: Solve for x
    x = 55,909,187.10/8,128.98
  6. Step 6: Final answer
    x = 6,877.76

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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.