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Finding the Fourth Proportional to 12,887,429.78, 17,784,528.06 and 7,007,063.88

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Solution

The fourth proportional to 12,887,429.78, 17,784,528.06 and 7,007,063.88 is: 9,669,680.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887,429.78 : 17,784,528.06 = 7,007,063.88 : x
  2. Step 2: Convert to fraction form
    12,887,429.78/17,784,528.06 = 7,007,063.88/x
  3. Step 3: Cross multiply
    12,887,429.78x = 17,784,528.06 × 7,007,063.88
  4. Step 4: Simplify right side
    12,887,429.78x = 124,617,324,179,415.44
  5. Step 5: Solve for x
    x = 124,617,324,179,415.44/12,887,429.78
  6. Step 6: Final answer
    x = 9,669,680.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.