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Finding the Fourth Proportional to 20,844.48, 28,765.48 and 11,413.92

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Solution

The fourth proportional to 20,844.48, 28,765.48 and 11,413.92 is: 15,751.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,844.48 : 28,765.48 = 11,413.92 : x
  2. Step 2: Convert to fraction form
    20,844.48/28,765.48 = 11,413.92/x
  3. Step 3: Cross multiply
    20,844.48x = 28,765.48 × 11,413.92
  4. Step 4: Simplify right side
    20,844.48x = 328,326,887.48
  5. Step 5: Solve for x
    x = 328,326,887.48/20,844.48
  6. Step 6: Final answer
    x = 15,751.26

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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.