Home / 12,922.64-19,382.88-5,129.36

Finding the Fourth Proportional to 12,922.64, 19,382.88 and 5,129.36

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Solution

The fourth proportional to 12,922.64, 19,382.88 and 5,129.36 is: 7,693.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,922.64 : 19,382.88 = 5,129.36 : x
  2. Step 2: Convert to fraction form
    12,922.64/19,382.88 = 5,129.36/x
  3. Step 3: Cross multiply
    12,922.64x = 19,382.88 × 5,129.36
  4. Step 4: Simplify right side
    12,922.64x = 99,421,769.36
  5. Step 5: Solve for x
    x = 99,421,769.36/12,922.64
  6. Step 6: Final answer
    x = 7,693.61

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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.