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Finding the Fourth Proportional to 12,672,392.80, 19,013,254.80 and 4,153,007.20

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Solution

The fourth proportional to 12,672,392.80, 19,013,254.80 and 4,153,007.20 is: 6,231,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672,392.80 : 19,013,254.80 = 4,153,007.20 : x
  2. Step 2: Convert to fraction form
    12,672,392.80/19,013,254.80 = 4,153,007.20/x
  3. Step 3: Cross multiply
    12,672,392.80x = 19,013,254.80 × 4,153,007.20
  4. Step 4: Simplify right side
    12,672,392.80x = 78,962,184,079,834.56
  5. Step 5: Solve for x
    x = 78,962,184,079,834.56/12,672,392.80
  6. Step 6: Final answer
    x = 6,231,039.81

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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.