Home / 19,917.71-27,488.05-11,420.62

Finding the Fourth Proportional to 19,917.71, 27,488.05 and 11,420.62

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Solution

The fourth proportional to 19,917.71, 27,488.05 and 11,420.62 is: 15,761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.71 : 27,488.05 = 11,420.62 : x
  2. Step 2: Convert to fraction form
    19,917.71/27,488.05 = 11,420.62/x
  3. Step 3: Cross multiply
    19,917.71x = 27,488.05 × 11,420.62
  4. Step 4: Simplify right side
    19,917.71x = 313,930,619.64
  5. Step 5: Solve for x
    x = 313,930,619.64/19,917.71
  6. Step 6: Final answer
    x = 15,761.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.