Home / 28,561.64-39,413.76-15,813.92

Finding the Fourth Proportional to 28,561.64, 39,413.76 and 15,813.92

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Solution

The fourth proportional to 28,561.64, 39,413.76 and 15,813.92 is: 21,822.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,561.64 : 39,413.76 = 15,813.92 : x
  2. Step 2: Convert to fraction form
    28,561.64/39,413.76 = 15,813.92/x
  3. Step 3: Cross multiply
    28,561.64x = 39,413.76 × 15,813.92
  4. Step 4: Simplify right side
    28,561.64x = 623,285,850.47
  5. Step 5: Solve for x
    x = 623,285,850.47/28,561.64
  6. Step 6: Final answer
    x = 21,822.48

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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.