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Finding the Fourth Proportional to 7,485.90, 11,232.90 and 3,103.80

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Solution

The fourth proportional to 7,485.90, 11,232.90 and 3,103.80 is: 4,657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.90 : 11,232.90 = 3,103.80 : x
  2. Step 2: Convert to fraction form
    7,485.90/11,232.90 = 3,103.80/x
  3. Step 3: Cross multiply
    7,485.90x = 11,232.90 × 3,103.80
  4. Step 4: Simplify right side
    7,485.90x = 34,864,675.02
  5. Step 5: Solve for x
    x = 34,864,675.02/7,485.90
  6. Step 6: Final answer
    x = 4,657.38

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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.