Home / 20,636.70-28,413.90-18,211.56

Finding the Fourth Proportional to 20,636.70, 28,413.90 and 18,211.56

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Solution

The fourth proportional to 20,636.70, 28,413.90 and 18,211.56 is: 25,074.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.70 : 28,413.90 = 18,211.56 : x
  2. Step 2: Convert to fraction form
    20,636.70/28,413.90 = 18,211.56/x
  3. Step 3: Cross multiply
    20,636.70x = 28,413.90 × 18,211.56
  4. Step 4: Simplify right side
    20,636.70x = 517,461,444.68
  5. Step 5: Solve for x
    x = 517,461,444.68/20,636.70
  6. Step 6: Final answer
    x = 25,074.82

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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.