Home / 19,917.19-29,871.82-12,780.32

Finding the Fourth Proportional to 19,917.19, 29,871.82 and 12,780.32

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Solution

The fourth proportional to 19,917.19, 29,871.82 and 12,780.32 is: 19,167.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.19 : 29,871.82 = 12,780.32 : x
  2. Step 2: Convert to fraction form
    19,917.19/29,871.82 = 12,780.32/x
  3. Step 3: Cross multiply
    19,917.19x = 29,871.82 × 12,780.32
  4. Step 4: Simplify right side
    19,917.19x = 381,771,453.23
  5. Step 5: Solve for x
    x = 381,771,453.23/19,917.19
  6. Step 6: Final answer
    x = 19,167.94

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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.