Home / 8,166.24-11,264.40-7,120.80

Finding the Fourth Proportional to 8,166.24, 11,264.40 and 7,120.80

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Solution

The fourth proportional to 8,166.24, 11,264.40 and 7,120.80 is: 9,822.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,166.24 : 11,264.40 = 7,120.80 : x
  2. Step 2: Convert to fraction form
    8,166.24/11,264.40 = 7,120.80/x
  3. Step 3: Cross multiply
    8,166.24x = 11,264.40 × 7,120.80
  4. Step 4: Simplify right side
    8,166.24x = 80,211,539.52
  5. Step 5: Solve for x
    x = 80,211,539.52/8,166.24
  6. Step 6: Final answer
    x = 9,822.33

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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.