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Finding the Fourth Proportional to 13,608,805.40, 20,392,212.90 and 11,803,218.20

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Solution

The fourth proportional to 13,608,805.40, 20,392,212.90 and 11,803,218.20 is: 17,686,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,805.40 : 20,392,212.90 = 11,803,218.20 : x
  2. Step 2: Convert to fraction form
    13,608,805.40/20,392,212.90 = 11,803,218.20/x
  3. Step 3: Cross multiply
    13,608,805.40x = 20,392,212.90 × 11,803,218.20
  4. Step 4: Simplify right side
    13,608,805.40x = 240,693,738,439,554.75
  5. Step 5: Solve for x
    x = 240,693,738,439,554.75/13,608,805.40
  6. Step 6: Final answer
    x = 17,686,617.70

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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.