Home / 21,413.52-32,078.72-15,780.96

Finding the Fourth Proportional to 21,413.52, 32,078.72 and 15,780.96

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Solution

The fourth proportional to 21,413.52, 32,078.72 and 15,780.96 is: 23,640.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.52 : 32,078.72 = 15,780.96 : x
  2. Step 2: Convert to fraction form
    21,413.52/32,078.72 = 15,780.96/x
  3. Step 3: Cross multiply
    21,413.52x = 32,078.72 × 15,780.96
  4. Step 4: Simplify right side
    21,413.52x = 506,232,997.17
  5. Step 5: Solve for x
    x = 506,232,997.17/21,413.52
  6. Step 6: Final answer
    x = 23,640.81

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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.