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Finding the Fourth Proportional to 16,978,658.40, 25,412,000.40 and 11,939,810.40

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Solution

The fourth proportional to 16,978,658.40, 25,412,000.40 and 11,939,810.40 is: 17,870,344.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,978,658.40 : 25,412,000.40 = 11,939,810.40 : x
  2. Step 2: Convert to fraction form
    16,978,658.40/25,412,000.40 = 11,939,810.40/x
  3. Step 3: Cross multiply
    16,978,658.40x = 25,412,000.40 × 11,939,810.40
  4. Step 4: Simplify right side
    16,978,658.40x = 303,414,466,660,724.12
  5. Step 5: Solve for x
    x = 303,414,466,660,724.12/16,978,658.40
  6. Step 6: Final answer
    x = 17,870,344.02

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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.