Home / 22,620.88-31,215.40-13,663.09

Finding the Fourth Proportional to 22,620.88, 31,215.40 and 13,663.09

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Solution

The fourth proportional to 22,620.88, 31,215.40 and 13,663.09 is: 18,854.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,620.88 : 31,215.40 = 13,663.09 : x
  2. Step 2: Convert to fraction form
    22,620.88/31,215.40 = 13,663.09/x
  3. Step 3: Cross multiply
    22,620.88x = 31,215.40 × 13,663.09
  4. Step 4: Simplify right side
    22,620.88x = 426,498,819.59
  5. Step 5: Solve for x
    x = 426,498,819.59/22,620.88
  6. Step 6: Final answer
    x = 18,854.21

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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.