Home / 20,712.78-28,583.62-11,281.41

Finding the Fourth Proportional to 20,712.78, 28,583.62 and 11,281.41

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Solution

The fourth proportional to 20,712.78, 28,583.62 and 11,281.41 is: 15,568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.78 : 28,583.62 = 11,281.41 : x
  2. Step 2: Convert to fraction form
    20,712.78/28,583.62 = 11,281.41/x
  3. Step 3: Cross multiply
    20,712.78x = 28,583.62 × 11,281.41
  4. Step 4: Simplify right side
    20,712.78x = 322,463,508.30
  5. Step 5: Solve for x
    x = 322,463,508.30/20,712.78
  6. Step 6: Final answer
    x = 15,568.34

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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.