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Finding the Fourth Proportional to 6,990.24, 10,472.40 and 6,212.64

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Solution

The fourth proportional to 6,990.24, 10,472.40 and 6,212.64 is: 9,307.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.24 : 10,472.40 = 6,212.64 : x
  2. Step 2: Convert to fraction form
    6,990.24/10,472.40 = 6,212.64/x
  3. Step 3: Cross multiply
    6,990.24x = 10,472.40 × 6,212.64
  4. Step 4: Simplify right side
    6,990.24x = 65,061,251.14
  5. Step 5: Solve for x
    x = 65,061,251.14/6,990.24
  6. Step 6: Final answer
    x = 9,307.44

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.