Home / 12,921.64-19,385.68-3,687.64

Finding the Fourth Proportional to 12,921.64, 19,385.68 and 3,687.64

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Solution

The fourth proportional to 12,921.64, 19,385.68 and 3,687.64 is: 5,532.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.64 : 19,385.68 = 3,687.64 : x
  2. Step 2: Convert to fraction form
    12,921.64/19,385.68 = 3,687.64/x
  3. Step 3: Cross multiply
    12,921.64x = 19,385.68 × 3,687.64
  4. Step 4: Simplify right side
    12,921.64x = 71,487,409.00
  5. Step 5: Solve for x
    x = 71,487,409.00/12,921.64
  6. Step 6: Final answer
    x = 5,532.38

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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.