Home / 7,087.12-9,778.80-4,101.88

Finding the Fourth Proportional to 7,087.12, 9,778.80 and 4,101.88

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Solution

The fourth proportional to 7,087.12, 9,778.80 and 4,101.88 is: 5,659.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.12 : 9,778.80 = 4,101.88 : x
  2. Step 2: Convert to fraction form
    7,087.12/9,778.80 = 4,101.88/x
  3. Step 3: Cross multiply
    7,087.12x = 9,778.80 × 4,101.88
  4. Step 4: Simplify right side
    7,087.12x = 40,111,464.14
  5. Step 5: Solve for x
    x = 40,111,464.14/7,087.12
  6. Step 6: Final answer
    x = 5,659.77

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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.