Home / 20,721.33-28,594.40-11,767.59

Finding the Fourth Proportional to 20,721.33, 28,594.40 and 11,767.59

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Solution

The fourth proportional to 20,721.33, 28,594.40 and 11,767.59 is: 16,238.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.33 : 28,594.40 = 11,767.59 : x
  2. Step 2: Convert to fraction form
    20,721.33/28,594.40 = 11,767.59/x
  3. Step 3: Cross multiply
    20,721.33x = 28,594.40 × 11,767.59
  4. Step 4: Simplify right side
    20,721.33x = 336,487,116.66
  5. Step 5: Solve for x
    x = 336,487,116.66/20,721.33
  6. Step 6: Final answer
    x = 16,238.68

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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.