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Finding the Fourth Proportional to 17,978,048.80, 26,967,073.20 and 11,931,431.20

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Solution

The fourth proportional to 17,978,048.80, 26,967,073.20 and 11,931,431.20 is: 17,897,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978,048.80 : 26,967,073.20 = 11,931,431.20 : x
  2. Step 2: Convert to fraction form
    17,978,048.80/26,967,073.20 = 11,931,431.20/x
  3. Step 3: Cross multiply
    17,978,048.80x = 26,967,073.20 × 11,931,431.20
  4. Step 4: Simplify right side
    17,978,048.80x = 321,755,778,551,163.81
  5. Step 5: Solve for x
    x = 321,755,778,551,163.81/17,978,048.80
  6. Step 6: Final answer
    x = 17,897,146.80

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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.