Home / 12,764.86-19,128.56-6,431.06

Finding the Fourth Proportional to 12,764.86, 19,128.56 and 6,431.06

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Solution

The fourth proportional to 12,764.86, 19,128.56 and 6,431.06 is: 9,637.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,764.86 : 19,128.56 = 6,431.06 : x
  2. Step 2: Convert to fraction form
    12,764.86/19,128.56 = 6,431.06/x
  3. Step 3: Cross multiply
    12,764.86x = 19,128.56 × 6,431.06
  4. Step 4: Simplify right side
    12,764.86x = 123,016,932.74
  5. Step 5: Solve for x
    x = 123,016,932.74/12,764.86
  6. Step 6: Final answer
    x = 9,637.16

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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.