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Finding the Fourth Proportional to 7,490.60, 11,211.60 and 5,838.20

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Solution

The fourth proportional to 7,490.60, 11,211.60 and 5,838.20 is: 8,738.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490.60 : 11,211.60 = 5,838.20 : x
  2. Step 2: Convert to fraction form
    7,490.60/11,211.60 = 5,838.20/x
  3. Step 3: Cross multiply
    7,490.60x = 11,211.60 × 5,838.20
  4. Step 4: Simplify right side
    7,490.60x = 65,455,563.12
  5. Step 5: Solve for x
    x = 65,455,563.12/7,490.60
  6. Step 6: Final answer
    x = 8,738.36

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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.