Home / 20,491.07-28,282.28-13,413.38

Finding the Fourth Proportional to 20,491.07, 28,282.28 and 13,413.38

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Solution

The fourth proportional to 20,491.07, 28,282.28 and 13,413.38 is: 18,513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.07 : 28,282.28 = 13,413.38 : x
  2. Step 2: Convert to fraction form
    20,491.07/28,282.28 = 13,413.38/x
  3. Step 3: Cross multiply
    20,491.07x = 28,282.28 × 13,413.38
  4. Step 4: Simplify right side
    20,491.07x = 379,360,760.43
  5. Step 5: Solve for x
    x = 379,360,760.43/20,491.07
  6. Step 6: Final answer
    x = 18,513.47

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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.