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Finding the Fourth Proportional to 26,408,561.40, 39,612,978.78 and 12,021,567.78

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Solution

The fourth proportional to 26,408,561.40, 39,612,978.78 and 12,021,567.78 is: 18,032,413.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,408,561.40 : 39,612,978.78 = 12,021,567.78 : x
  2. Step 2: Convert to fraction form
    26,408,561.40/39,612,978.78 = 12,021,567.78/x
  3. Step 3: Cross multiply
    26,408,561.40x = 39,612,978.78 × 12,021,567.78
  4. Step 4: Simplify right side
    26,408,561.40x = 476,210,109,371,471.69
  5. Step 5: Solve for x
    x = 476,210,109,371,471.69/26,408,561.40
  6. Step 6: Final answer
    x = 18,032,413.89

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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.