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Finding the Fourth Proportional to 13,891.37, 20,840.69 and 4,031.37

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Solution

The fourth proportional to 13,891.37, 20,840.69 and 4,031.37 is: 6,048.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.37 : 20,840.69 = 4,031.37 : x
  2. Step 2: Convert to fraction form
    13,891.37/20,840.69 = 4,031.37/x
  3. Step 3: Cross multiply
    13,891.37x = 20,840.69 × 4,031.37
  4. Step 4: Simplify right side
    13,891.37x = 84,016,542.52
  5. Step 5: Solve for x
    x = 84,016,542.52/13,891.37
  6. Step 6: Final answer
    x = 6,048.11

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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.