Home / 20,589.76-28,413.79-11,158.35

Finding the Fourth Proportional to 20,589.76, 28,413.79 and 11,158.35

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Solution

The fourth proportional to 20,589.76, 28,413.79 and 11,158.35 is: 15,398.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.76 : 28,413.79 = 11,158.35 : x
  2. Step 2: Convert to fraction form
    20,589.76/28,413.79 = 11,158.35/x
  3. Step 3: Cross multiply
    20,589.76x = 28,413.79 × 11,158.35
  4. Step 4: Simplify right side
    20,589.76x = 317,051,013.65
  5. Step 5: Solve for x
    x = 317,051,013.65/20,589.76
  6. Step 6: Final answer
    x = 15,398.48

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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.