Home / 21,016.82-31,525.16-6,977.91

Finding the Fourth Proportional to 21,016.82, 31,525.16 and 6,977.91

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Solution

The fourth proportional to 21,016.82, 31,525.16 and 6,977.91 is: 10,466.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,016.82 : 31,525.16 = 6,977.91 : x
  2. Step 2: Convert to fraction form
    21,016.82/31,525.16 = 6,977.91/x
  3. Step 3: Cross multiply
    21,016.82x = 31,525.16 × 6,977.91
  4. Step 4: Simplify right side
    21,016.82x = 219,979,728.61
  5. Step 5: Solve for x
    x = 219,979,728.61/21,016.82
  6. Step 6: Final answer
    x = 10,466.84

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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.