Home / 20,413.92-28,171.44-11,461.68

Finding the Fourth Proportional to 20,413.92, 28,171.44 and 11,461.68

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Solution

The fourth proportional to 20,413.92, 28,171.44 and 11,461.68 is: 15,817.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,413.92 : 28,171.44 = 11,461.68 : x
  2. Step 2: Convert to fraction form
    20,413.92/28,171.44 = 11,461.68/x
  3. Step 3: Cross multiply
    20,413.92x = 28,171.44 × 11,461.68
  4. Step 4: Simplify right side
    20,413.92x = 322,892,030.42
  5. Step 5: Solve for x
    x = 322,892,030.42/20,413.92
  6. Step 6: Final answer
    x = 15,817.25

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1.5x scale

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.