Home / 21,118.64-31,677.92-8,644.48

Finding the Fourth Proportional to 21,118.64, 31,677.92 and 8,644.48

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Solution

The fourth proportional to 21,118.64, 31,677.92 and 8,644.48 is: 12,966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.64 : 31,677.92 = 8,644.48 : x
  2. Step 2: Convert to fraction form
    21,118.64/31,677.92 = 8,644.48/x
  3. Step 3: Cross multiply
    21,118.64x = 31,677.92 × 8,644.48
  4. Step 4: Simplify right side
    21,118.64x = 273,839,145.88
  5. Step 5: Solve for x
    x = 273,839,145.88/21,118.64
  6. Step 6: Final answer
    x = 12,966.70

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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.