Home / 12,921.30-19,367.84-5,530.16

Finding the Fourth Proportional to 12,921.30, 19,367.84 and 5,530.16

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Solution

The fourth proportional to 12,921.30, 19,367.84 and 5,530.16 is: 8,289.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.30 : 19,367.84 = 5,530.16 : x
  2. Step 2: Convert to fraction form
    12,921.30/19,367.84 = 5,530.16/x
  3. Step 3: Cross multiply
    12,921.30x = 19,367.84 × 5,530.16
  4. Step 4: Simplify right side
    12,921.30x = 107,107,129.56
  5. Step 5: Solve for x
    x = 107,107,129.56/12,921.30
  6. Step 6: Final answer
    x = 8,289.19

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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.