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Finding the Fourth Proportional to 7,391.80, 11,087.70 and 3,503.80

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Solution

The fourth proportional to 7,391.80, 11,087.70 and 3,503.80 is: 5,255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,391.80 : 11,087.70 = 3,503.80 : x
  2. Step 2: Convert to fraction form
    7,391.80/11,087.70 = 3,503.80/x
  3. Step 3: Cross multiply
    7,391.80x = 11,087.70 × 3,503.80
  4. Step 4: Simplify right side
    7,391.80x = 38,849,083.26
  5. Step 5: Solve for x
    x = 38,849,083.26/7,391.80
  6. Step 6: Final answer
    x = 5,255.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.