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Finding the Fourth Proportional to 7,478.70, 11,205.45 and 5,912.70

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Solution

The fourth proportional to 7,478.70, 11,205.45 and 5,912.70 is: 8,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.70 : 11,205.45 = 5,912.70 : x
  2. Step 2: Convert to fraction form
    7,478.70/11,205.45 = 5,912.70/x
  3. Step 3: Cross multiply
    7,478.70x = 11,205.45 × 5,912.70
  4. Step 4: Simplify right side
    7,478.70x = 66,254,464.22
  5. Step 5: Solve for x
    x = 66,254,464.22/7,478.70
  6. Step 6: Final answer
    x = 8,859.09

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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.