Home / 13,875.82-20,811.62-5,108.64

Finding the Fourth Proportional to 13,875.82, 20,811.62 and 5,108.64

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Solution

The fourth proportional to 13,875.82, 20,811.62 and 5,108.64 is: 7,662.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.82 : 20,811.62 = 5,108.64 : x
  2. Step 2: Convert to fraction form
    13,875.82/20,811.62 = 5,108.64/x
  3. Step 3: Cross multiply
    13,875.82x = 20,811.62 × 5,108.64
  4. Step 4: Simplify right side
    13,875.82x = 106,319,074.40
  5. Step 5: Solve for x
    x = 106,319,074.40/13,875.82
  6. Step 6: Final answer
    x = 7,662.18

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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.