Home / 20,504.20-28,295.80-11,072.76

Finding the Fourth Proportional to 20,504.20, 28,295.80 and 11,072.76

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Solution

The fourth proportional to 20,504.20, 28,295.80 and 11,072.76 is: 15,280.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.20 : 28,295.80 = 11,072.76 : x
  2. Step 2: Convert to fraction form
    20,504.20/28,295.80 = 11,072.76/x
  3. Step 3: Cross multiply
    20,504.20x = 28,295.80 × 11,072.76
  4. Step 4: Simplify right side
    20,504.20x = 313,312,582.41
  5. Step 5: Solve for x
    x = 313,312,582.41/20,504.20
  6. Step 6: Final answer
    x = 15,280.41

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Half scale
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Double scale
Find fourth proportional to 20,505.20, 28,297.18 and 11,073.76
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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.