Home / 21,110.25-31,660.37-6,315.20

Finding the Fourth Proportional to 21,110.25, 31,660.37 and 6,315.20

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Solution

The fourth proportional to 21,110.25, 31,660.37 and 6,315.20 is: 9,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.25 : 31,660.37 = 6,315.20 : x
  2. Step 2: Convert to fraction form
    21,110.25/31,660.37 = 6,315.20/x
  3. Step 3: Cross multiply
    21,110.25x = 31,660.37 × 6,315.20
  4. Step 4: Simplify right side
    21,110.25x = 199,941,521.15
  5. Step 5: Solve for x
    x = 199,941,521.15/21,110.25
  6. Step 6: Final answer
    x = 9,471.30

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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.