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Finding the Fourth Proportional to 7,486.40, 11,240.40 and 5,304.80

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Solution

The fourth proportional to 7,486.40, 11,240.40 and 5,304.80 is: 7,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,486.40 : 11,240.40 = 5,304.80 : x
  2. Step 2: Convert to fraction form
    7,486.40/11,240.40 = 5,304.80/x
  3. Step 3: Cross multiply
    7,486.40x = 11,240.40 × 5,304.80
  4. Step 4: Simplify right side
    7,486.40x = 59,628,073.92
  5. Step 5: Solve for x
    x = 59,628,073.92/7,486.40
  6. Step 6: Final answer
    x = 7,964.85

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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.