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Finding the Fourth Proportional to 40,155, 55,413.90 and 22,491

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Solution

The fourth proportional to 40,155, 55,413.90 and 22,491 is: 31,037.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,155 : 55,413.90 = 22,491 : x
  2. Step 2: Convert to fraction form
    40,155/55,413.90 = 22,491/x
  3. Step 3: Cross multiply
    40,155x = 55,413.90 × 22,491
  4. Step 4: Simplify right side
    40,155x = 1,246,314,024.90
  5. Step 5: Solve for x
    x = 1,246,314,024.90/40,155
  6. Step 6: Final answer
    x = 31,037.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.