Home / 21,276.28-31,919.82-8,127.28

Finding the Fourth Proportional to 21,276.28, 31,919.82 and 8,127.28

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Solution

The fourth proportional to 21,276.28, 31,919.82 and 8,127.28 is: 12,192.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.28 : 31,919.82 = 8,127.28 : x
  2. Step 2: Convert to fraction form
    21,276.28/31,919.82 = 8,127.28/x
  3. Step 3: Cross multiply
    21,276.28x = 31,919.82 × 8,127.28
  4. Step 4: Simplify right side
    21,276.28x = 259,421,314.69
  5. Step 5: Solve for x
    x = 259,421,314.69/21,276.28
  6. Step 6: Final answer
    x = 12,192.98

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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.