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Finding the Fourth Proportional to 7,305.50, 10,049.72 and 6,405.18

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Solution

The fourth proportional to 7,305.50, 10,049.72 and 6,405.18 is: 8,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,305.50 : 10,049.72 = 6,405.18 : x
  2. Step 2: Convert to fraction form
    7,305.50/10,049.72 = 6,405.18/x
  3. Step 3: Cross multiply
    7,305.50x = 10,049.72 × 6,405.18
  4. Step 4: Simplify right side
    7,305.50x = 64,370,265.55
  5. Step 5: Solve for x
    x = 64,370,265.55/7,305.50
  6. Step 6: Final answer
    x = 8,811.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.