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Finding the Fourth Proportional to 11,986,278.96, 17,978,941.80 and 6,605,598

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Solution

The fourth proportional to 11,986,278.96, 17,978,941.80 and 6,605,598 is: 9,908,134.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986,278.96 : 17,978,941.80 = 6,605,598 : x
  2. Step 2: Convert to fraction form
    11,986,278.96/17,978,941.80 = 6,605,598/x
  3. Step 3: Cross multiply
    11,986,278.96x = 17,978,941.80 × 6,605,598
  4. Step 4: Simplify right side
    11,986,278.96x = 118,761,661,996,196.41
  5. Step 5: Solve for x
    x = 118,761,661,996,196.41/11,986,278.96
  6. Step 6: Final answer
    x = 9,908,134.33

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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.