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Finding the Fourth Proportional to 6,643,586.40, 9,965,379.60 and 6,517,615.20

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Solution

The fourth proportional to 6,643,586.40, 9,965,379.60 and 6,517,615.20 is: 9,776,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643,586.40 : 9,965,379.60 = 6,517,615.20 : x
  2. Step 2: Convert to fraction form
    6,643,586.40/9,965,379.60 = 6,517,615.20/x
  3. Step 3: Cross multiply
    6,643,586.40x = 9,965,379.60 × 6,517,615.20
  4. Step 4: Simplify right side
    6,643,586.40x = 64,950,509,554,729.92
  5. Step 5: Solve for x
    x = 64,950,509,554,729.92/6,643,586.40
  6. Step 6: Final answer
    x = 9,776,422.80

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Similar ratio
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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.