Home / 13,871.16-20,814.96-5,112.21

Finding the Fourth Proportional to 13,871.16, 20,814.96 and 5,112.21

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Solution

The fourth proportional to 13,871.16, 20,814.96 and 5,112.21 is: 7,671.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.16 : 20,814.96 = 5,112.21 : x
  2. Step 2: Convert to fraction form
    13,871.16/20,814.96 = 5,112.21/x
  3. Step 3: Cross multiply
    13,871.16x = 20,814.96 × 5,112.21
  4. Step 4: Simplify right side
    13,871.16x = 106,410,446.66
  5. Step 5: Solve for x
    x = 106,410,446.66/13,871.16
  6. Step 6: Final answer
    x = 7,671.34

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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.