Home / 20,517.10-28,325.80-13,455.82

Finding the Fourth Proportional to 20,517.10, 28,325.80 and 13,455.82

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Solution

The fourth proportional to 20,517.10, 28,325.80 and 13,455.82 is: 18,577.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.10 : 28,325.80 = 13,455.82 : x
  2. Step 2: Convert to fraction form
    20,517.10/28,325.80 = 13,455.82/x
  3. Step 3: Cross multiply
    20,517.10x = 28,325.80 × 13,455.82
  4. Step 4: Simplify right side
    20,517.10x = 381,146,918.38
  5. Step 5: Solve for x
    x = 381,146,918.38/20,517.10
  6. Step 6: Final answer
    x = 18,577.04

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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.