Home / 21,139.88-31,709.82-5,557.48

Finding the Fourth Proportional to 21,139.88, 31,709.82 and 5,557.48

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Solution

The fourth proportional to 21,139.88, 31,709.82 and 5,557.48 is: 8,336.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.88 : 31,709.82 = 5,557.48 : x
  2. Step 2: Convert to fraction form
    21,139.88/31,709.82 = 5,557.48/x
  3. Step 3: Cross multiply
    21,139.88x = 31,709.82 × 5,557.48
  4. Step 4: Simplify right side
    21,139.88x = 176,226,690.45
  5. Step 5: Solve for x
    x = 176,226,690.45/21,139.88
  6. Step 6: Final answer
    x = 8,336.22

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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.