Home / 20,701.69-28,568.19-11,270.23

Finding the Fourth Proportional to 20,701.69, 28,568.19 and 11,270.23

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Solution

The fourth proportional to 20,701.69, 28,568.19 and 11,270.23 is: 15,552.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.69 : 28,568.19 = 11,270.23 : x
  2. Step 2: Convert to fraction form
    20,701.69/28,568.19 = 11,270.23/x
  3. Step 3: Cross multiply
    20,701.69x = 28,568.19 × 11,270.23
  4. Step 4: Simplify right side
    20,701.69x = 321,970,071.98
  5. Step 5: Solve for x
    x = 321,970,071.98/20,701.69
  6. Step 6: Final answer
    x = 15,552.84

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Double scale
Find fourth proportional to 20,702.69, 28,569.57 and 11,271.23
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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.