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Finding the Fourth Proportional to 7,000.80, 10,501.20 and 6,441.90

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Solution

The fourth proportional to 7,000.80, 10,501.20 and 6,441.90 is: 9,662.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,000.80 : 10,501.20 = 6,441.90 : x
  2. Step 2: Convert to fraction form
    7,000.80/10,501.20 = 6,441.90/x
  3. Step 3: Cross multiply
    7,000.80x = 10,501.20 × 6,441.90
  4. Step 4: Simplify right side
    7,000.80x = 67,647,680.28
  5. Step 5: Solve for x
    x = 67,647,680.28/7,000.80
  6. Step 6: Final answer
    x = 9,662.85

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Half scale
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Double scale
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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.