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Finding the Fourth Proportional to 7,478.40, 11,228.40 and 5,296.80

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Solution

The fourth proportional to 7,478.40, 11,228.40 and 5,296.80 is: 7,952.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.40 : 11,228.40 = 5,296.80 : x
  2. Step 2: Convert to fraction form
    7,478.40/11,228.40 = 5,296.80/x
  3. Step 3: Cross multiply
    7,478.40x = 11,228.40 × 5,296.80
  4. Step 4: Simplify right side
    7,478.40x = 59,474,589.12
  5. Step 5: Solve for x
    x = 59,474,589.12/7,478.40
  6. Step 6: Final answer
    x = 7,952.85

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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.