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Finding the Fourth Proportional to 12,393,619.20, 18,590,428.80 and 11,590,552.80

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Solution

The fourth proportional to 12,393,619.20, 18,590,428.80 and 11,590,552.80 is: 17,385,829.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393,619.20 : 18,590,428.80 = 11,590,552.80 : x
  2. Step 2: Convert to fraction form
    12,393,619.20/18,590,428.80 = 11,590,552.80/x
  3. Step 3: Cross multiply
    12,393,619.20x = 18,590,428.80 × 11,590,552.80
  4. Step 4: Simplify right side
    12,393,619.20x = 215,473,346,581,040.66
  5. Step 5: Solve for x
    x = 215,473,346,581,040.66/12,393,619.20
  6. Step 6: Final answer
    x = 17,385,829.20

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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.