Home / 11,120.80-15,339.44-7,135.60

Finding the Fourth Proportional to 11,120.80, 15,339.44 and 7,135.60

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Solution

The fourth proportional to 11,120.80, 15,339.44 and 7,135.60 is: 9,842.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120.80 : 15,339.44 = 7,135.60 : x
  2. Step 2: Convert to fraction form
    11,120.80/15,339.44 = 7,135.60/x
  3. Step 3: Cross multiply
    11,120.80x = 15,339.44 × 7,135.60
  4. Step 4: Simplify right side
    11,120.80x = 109,456,108.06
  5. Step 5: Solve for x
    x = 109,456,108.06/11,120.80
  6. Step 6: Final answer
    x = 9,842.47

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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.