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Finding the Fourth Proportional to 7,135.60, 10,703.40 and 6,811.60

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Solution

The fourth proportional to 7,135.60, 10,703.40 and 6,811.60 is: 10,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.60 : 10,703.40 = 6,811.60 : x
  2. Step 2: Convert to fraction form
    7,135.60/10,703.40 = 6,811.60/x
  3. Step 3: Cross multiply
    7,135.60x = 10,703.40 × 6,811.60
  4. Step 4: Simplify right side
    7,135.60x = 72,907,279.44
  5. Step 5: Solve for x
    x = 72,907,279.44/7,135.60
  6. Step 6: Final answer
    x = 10,217.40

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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.