Home / 7,087.89-9,781.09-4,103.78

Finding the Fourth Proportional to 7,087.89, 9,781.09 and 4,103.78

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Solution

The fourth proportional to 7,087.89, 9,781.09 and 4,103.78 is: 5,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.89 : 9,781.09 = 4,103.78 : x
  2. Step 2: Convert to fraction form
    7,087.89/9,781.09 = 4,103.78/x
  3. Step 3: Cross multiply
    7,087.89x = 9,781.09 × 4,103.78
  4. Step 4: Simplify right side
    7,087.89x = 40,139,441.52
  5. Step 5: Solve for x
    x = 40,139,441.52/7,087.89
  6. Step 6: Final answer
    x = 5,663.10

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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.