Home / 21,721.41-29,976.21-12,767.27

Finding the Fourth Proportional to 21,721.41, 29,976.21 and 12,767.27

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Solution

The fourth proportional to 21,721.41, 29,976.21 and 12,767.27 is: 17,619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.41 : 29,976.21 = 12,767.27 : x
  2. Step 2: Convert to fraction form
    21,721.41/29,976.21 = 12,767.27/x
  3. Step 3: Cross multiply
    21,721.41x = 29,976.21 × 12,767.27
  4. Step 4: Simplify right side
    21,721.41x = 382,714,216.77
  5. Step 5: Solve for x
    x = 382,714,216.77/21,721.41
  6. Step 6: Final answer
    x = 17,619.22

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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.