Home / 12,672.48-19,009.80-3,909.36

Finding the Fourth Proportional to 12,672.48, 19,009.80 and 3,909.36

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Solution

The fourth proportional to 12,672.48, 19,009.80 and 3,909.36 is: 5,864.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.48 : 19,009.80 = 3,909.36 : x
  2. Step 2: Convert to fraction form
    12,672.48/19,009.80 = 3,909.36/x
  3. Step 3: Cross multiply
    12,672.48x = 19,009.80 × 3,909.36
  4. Step 4: Simplify right side
    12,672.48x = 74,316,151.73
  5. Step 5: Solve for x
    x = 74,316,151.73/12,672.48
  6. Step 6: Final answer
    x = 5,864.37

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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.