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Finding the Fourth Proportional to 7,447.20, 11,195.10 and 7,009.80

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Solution

The fourth proportional to 7,447.20, 11,195.10 and 7,009.80 is: 10,537.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,447.20 : 11,195.10 = 7,009.80 : x
  2. Step 2: Convert to fraction form
    7,447.20/11,195.10 = 7,009.80/x
  3. Step 3: Cross multiply
    7,447.20x = 11,195.10 × 7,009.80
  4. Step 4: Simplify right side
    7,447.20x = 78,475,411.98
  5. Step 5: Solve for x
    x = 78,475,411.98/7,447.20
  6. Step 6: Final answer
    x = 10,537.57

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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.