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Finding the Fourth Proportional to 7,391.40, 11,089.80 and 3,492.88

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Solution

The fourth proportional to 7,391.40, 11,089.80 and 3,492.88 is: 5,240.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,391.40 : 11,089.80 = 3,492.88 : x
  2. Step 2: Convert to fraction form
    7,391.40/11,089.80 = 3,492.88/x
  3. Step 3: Cross multiply
    7,391.40x = 11,089.80 × 3,492.88
  4. Step 4: Simplify right side
    7,391.40x = 38,735,340.62
  5. Step 5: Solve for x
    x = 38,735,340.62/7,391.40
  6. Step 6: Final answer
    x = 5,240.60

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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.