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Finding the Fourth Proportional to 7,674.40, 11,511.60 and 7,625.80

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Solution

The fourth proportional to 7,674.40, 11,511.60 and 7,625.80 is: 11,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,674.40 : 11,511.60 = 7,625.80 : x
  2. Step 2: Convert to fraction form
    7,674.40/11,511.60 = 7,625.80/x
  3. Step 3: Cross multiply
    7,674.40x = 11,511.60 × 7,625.80
  4. Step 4: Simplify right side
    7,674.40x = 87,785,159.28
  5. Step 5: Solve for x
    x = 87,785,159.28/7,674.40
  6. Step 6: Final answer
    x = 11,438.70

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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.