Home / 21,317.32-31,976.10-5,521.25

Finding the Fourth Proportional to 21,317.32, 31,976.10 and 5,521.25

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Solution

The fourth proportional to 21,317.32, 31,976.10 and 5,521.25 is: 8,281.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.32 : 31,976.10 = 5,521.25 : x
  2. Step 2: Convert to fraction form
    21,317.32/31,976.10 = 5,521.25/x
  3. Step 3: Cross multiply
    21,317.32x = 31,976.10 × 5,521.25
  4. Step 4: Simplify right side
    21,317.32x = 176,548,122.07
  5. Step 5: Solve for x
    x = 176,548,122.07/21,317.32
  6. Step 6: Final answer
    x = 8,281.91

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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.