Home / 21,175.80-31,721.34-12,737.64

Finding the Fourth Proportional to 21,175.80, 31,721.34 and 12,737.64

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Solution

The fourth proportional to 21,175.80, 31,721.34 and 12,737.64 is: 19,080.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.80 : 31,721.34 = 12,737.64 : x
  2. Step 2: Convert to fraction form
    21,175.80/31,721.34 = 12,737.64/x
  3. Step 3: Cross multiply
    21,175.80x = 31,721.34 × 12,737.64
  4. Step 4: Simplify right side
    21,175.80x = 404,055,009.24
  5. Step 5: Solve for x
    x = 404,055,009.24/21,175.80
  6. Step 6: Final answer
    x = 19,080.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.