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Finding the Fourth Proportional to 12,966,680.50, 17,894,707.89 and 7,460,891.90

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Solution

The fourth proportional to 12,966,680.50, 17,894,707.89 and 7,460,891.90 is: 10,296,427.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,966,680.50 : 17,894,707.89 = 7,460,891.90 : x
  2. Step 2: Convert to fraction form
    12,966,680.50/17,894,707.89 = 7,460,891.90/x
  3. Step 3: Cross multiply
    12,966,680.50x = 17,894,707.89 × 7,460,891.90
  4. Step 4: Simplify right side
    12,966,680.50x = 133,510,481,149,367.11
  5. Step 5: Solve for x
    x = 133,510,481,149,367.11/12,966,680.50
  6. Step 6: Final answer
    x = 10,296,427.15

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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.