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Finding the Fourth Proportional to 6,513.80, 9,770.70 and 6,129.80

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Solution

The fourth proportional to 6,513.80, 9,770.70 and 6,129.80 is: 9,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,513.80 : 9,770.70 = 6,129.80 : x
  2. Step 2: Convert to fraction form
    6,513.80/9,770.70 = 6,129.80/x
  3. Step 3: Cross multiply
    6,513.80x = 9,770.70 × 6,129.80
  4. Step 4: Simplify right side
    6,513.80x = 59,892,436.86
  5. Step 5: Solve for x
    x = 59,892,436.86/6,513.80
  6. Step 6: Final answer
    x = 9,194.70

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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.