Home / 20,506.83-30,761.10-10,639.77

Finding the Fourth Proportional to 20,506.83, 30,761.10 and 10,639.77

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Solution

The fourth proportional to 20,506.83, 30,761.10 and 10,639.77 is: 15,960.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.83 : 30,761.10 = 10,639.77 : x
  2. Step 2: Convert to fraction form
    20,506.83/30,761.10 = 10,639.77/x
  3. Step 3: Cross multiply
    20,506.83x = 30,761.10 × 10,639.77
  4. Step 4: Simplify right side
    20,506.83x = 327,291,028.95
  5. Step 5: Solve for x
    x = 327,291,028.95/20,506.83
  6. Step 6: Final answer
    x = 15,960.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.