Home / 8,118.60-11,209.86-7,135.56

Finding the Fourth Proportional to 8,118.60, 11,209.86 and 7,135.56

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Solution

The fourth proportional to 8,118.60, 11,209.86 and 7,135.56 is: 9,852.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.60 : 11,209.86 = 7,135.56 : x
  2. Step 2: Convert to fraction form
    8,118.60/11,209.86 = 7,135.56/x
  3. Step 3: Cross multiply
    8,118.60x = 11,209.86 × 7,135.56
  4. Step 4: Simplify right side
    8,118.60x = 79,988,628.62
  5. Step 5: Solve for x
    x = 79,988,628.62/8,118.60
  6. Step 6: Final answer
    x = 9,852.52

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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.