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Finding the Fourth Proportional to 7,803.80, 11,705.70 and 7,439.30

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Solution

The fourth proportional to 7,803.80, 11,705.70 and 7,439.30 is: 11,158.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,803.80 : 11,705.70 = 7,439.30 : x
  2. Step 2: Convert to fraction form
    7,803.80/11,705.70 = 7,439.30/x
  3. Step 3: Cross multiply
    7,803.80x = 11,705.70 × 7,439.30
  4. Step 4: Simplify right side
    7,803.80x = 87,082,214.01
  5. Step 5: Solve for x
    x = 87,082,214.01/7,803.80
  6. Step 6: Final answer
    x = 11,158.95

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Similar ratio
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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.