Home / 13,871.40-20,815.34-5,112.46

Finding the Fourth Proportional to 13,871.40, 20,815.34 and 5,112.46

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Solution

The fourth proportional to 13,871.40, 20,815.34 and 5,112.46 is: 7,671.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.40 : 20,815.34 = 5,112.46 : x
  2. Step 2: Convert to fraction form
    13,871.40/20,815.34 = 5,112.46/x
  3. Step 3: Cross multiply
    13,871.40x = 20,815.34 × 5,112.46
  4. Step 4: Simplify right side
    13,871.40x = 106,417,593.14
  5. Step 5: Solve for x
    x = 106,417,593.14/13,871.40
  6. Step 6: Final answer
    x = 7,671.73

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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.