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Finding the Fourth Proportional to 18,837,871.72, 28,215,610.52 and 13,356,350.98

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Solution

The fourth proportional to 18,837,871.72, 28,215,610.52 and 13,356,350.98 is: 20,005,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,837,871.72 : 28,215,610.52 = 13,356,350.98 : x
  2. Step 2: Convert to fraction form
    18,837,871.72/28,215,610.52 = 13,356,350.98/x
  3. Step 3: Cross multiply
    18,837,871.72x = 28,215,610.52 × 13,356,350.98
  4. Step 4: Simplify right side
    18,837,871.72x = 376,857,597,220,100.31
  5. Step 5: Solve for x
    x = 376,857,597,220,100.31/18,837,871.72
  6. Step 6: Final answer
    x = 20,005,317.10

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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.