Home / 20,721.51-28,594.71-11,767.86

Finding the Fourth Proportional to 20,721.51, 28,594.71 and 11,767.86

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Solution

The fourth proportional to 20,721.51, 28,594.71 and 11,767.86 is: 16,239.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.51 : 28,594.71 = 11,767.86 : x
  2. Step 2: Convert to fraction form
    20,721.51/28,594.71 = 11,767.86/x
  3. Step 3: Cross multiply
    20,721.51x = 28,594.71 × 11,767.86
  4. Step 4: Simplify right side
    20,721.51x = 336,498,544.02
  5. Step 5: Solve for x
    x = 336,498,544.02/20,721.51
  6. Step 6: Final answer
    x = 16,239.09

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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.