Home / 13,876.72-20,815.20-5,557.44

Finding the Fourth Proportional to 13,876.72, 20,815.20 and 5,557.44

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Solution

The fourth proportional to 13,876.72, 20,815.20 and 5,557.44 is: 8,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,876.72 : 20,815.20 = 5,557.44 : x
  2. Step 2: Convert to fraction form
    13,876.72/20,815.20 = 5,557.44/x
  3. Step 3: Cross multiply
    13,876.72x = 20,815.20 × 5,557.44
  4. Step 4: Simplify right side
    13,876.72x = 115,679,225.09
  5. Step 5: Solve for x
    x = 115,679,225.09/13,876.72
  6. Step 6: Final answer
    x = 8,336.21

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1.5x scale

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.