Home / 7,087.34-9,780.56-3,900.54

Finding the Fourth Proportional to 7,087.34, 9,780.56 and 3,900.54

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Solution

The fourth proportional to 7,087.34, 9,780.56 and 3,900.54 is: 5,382.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.34 : 9,780.56 = 3,900.54 : x
  2. Step 2: Convert to fraction form
    7,087.34/9,780.56 = 3,900.54/x
  3. Step 3: Cross multiply
    7,087.34x = 9,780.56 × 3,900.54
  4. Step 4: Simplify right side
    7,087.34x = 38,149,446.00
  5. Step 5: Solve for x
    x = 38,149,446.00/7,087.34
  6. Step 6: Final answer
    x = 5,382.76

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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.