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Finding the Fourth Proportional to 11,978,228.80, 17,967,343.20 and 8,577,006.40

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Solution

The fourth proportional to 11,978,228.80, 17,967,343.20 and 8,577,006.40 is: 12,865,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978,228.80 : 17,967,343.20 = 8,577,006.40 : x
  2. Step 2: Convert to fraction form
    11,978,228.80/17,967,343.20 = 8,577,006.40/x
  3. Step 3: Cross multiply
    11,978,228.80x = 17,967,343.20 × 8,577,006.40
  4. Step 4: Simplify right side
    11,978,228.80x = 154,106,017,617,396.47
  5. Step 5: Solve for x
    x = 154,106,017,617,396.47/11,978,228.80
  6. Step 6: Final answer
    x = 12,865,509.60

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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.