Home / 21,008.16-31,511.16-5,425.38

Finding the Fourth Proportional to 21,008.16, 31,511.16 and 5,425.38

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Solution

The fourth proportional to 21,008.16, 31,511.16 and 5,425.38 is: 8,137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.16 : 31,511.16 = 5,425.38 : x
  2. Step 2: Convert to fraction form
    21,008.16/31,511.16 = 5,425.38/x
  3. Step 3: Cross multiply
    21,008.16x = 31,511.16 × 5,425.38
  4. Step 4: Simplify right side
    21,008.16x = 170,960,017.24
  5. Step 5: Solve for x
    x = 170,960,017.24/21,008.16
  6. Step 6: Final answer
    x = 8,137.79

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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.