Home / 28,413.20-39,209.40-15,837.68

Finding the Fourth Proportional to 28,413.20, 39,209.40 and 15,837.68

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Solution

The fourth proportional to 28,413.20, 39,209.40 and 15,837.68 is: 21,855.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.20 : 39,209.40 = 15,837.68 : x
  2. Step 2: Convert to fraction form
    28,413.20/39,209.40 = 15,837.68/x
  3. Step 3: Cross multiply
    28,413.20x = 39,209.40 × 15,837.68
  4. Step 4: Simplify right side
    28,413.20x = 620,985,930.19
  5. Step 5: Solve for x
    x = 620,985,930.19/28,413.20
  6. Step 6: Final answer
    x = 21,855.54

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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.