Home / 31,444.86-43,413.30-21,639

Finding the Fourth Proportional to 31,444.86, 43,413.30 and 21,639

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Solution

The fourth proportional to 31,444.86, 43,413.30 and 21,639 is: 29,875.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,444.86 : 43,413.30 = 21,639 : x
  2. Step 2: Convert to fraction form
    31,444.86/43,413.30 = 21,639/x
  3. Step 3: Cross multiply
    31,444.86x = 43,413.30 × 21,639
  4. Step 4: Simplify right side
    31,444.86x = 939,420,398.70
  5. Step 5: Solve for x
    x = 939,420,398.70/31,444.86
  6. Step 6: Final answer
    x = 29,875.17

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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.