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Finding the Fourth Proportional to 12,589,991.10, 18,884,986.65 and 12,589,991.10

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Solution

The fourth proportional to 12,589,991.10, 18,884,986.65 and 12,589,991.10 is: 18,884,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,589,991.10 : 18,884,986.65 = 12,589,991.10 : x
  2. Step 2: Convert to fraction form
    12,589,991.10/18,884,986.65 = 12,589,991.10/x
  3. Step 3: Cross multiply
    12,589,991.10x = 18,884,986.65 × 12,589,991.10
  4. Step 4: Simplify right side
    12,589,991.10x = 237,761,813,847,118.78
  5. Step 5: Solve for x
    x = 237,761,813,847,118.78/12,589,991.10
  6. Step 6: Final answer
    x = 18,884,986.65

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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.