Home / 15,521.97-21,420.32-8,448.44

Finding the Fourth Proportional to 15,521.97, 21,420.32 and 8,448.44

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Solution

The fourth proportional to 15,521.97, 21,420.32 and 8,448.44 is: 11,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.97 : 21,420.32 = 8,448.44 : x
  2. Step 2: Convert to fraction form
    15,521.97/21,420.32 = 8,448.44/x
  3. Step 3: Cross multiply
    15,521.97x = 21,420.32 × 8,448.44
  4. Step 4: Simplify right side
    15,521.97x = 180,968,288.30
  5. Step 5: Solve for x
    x = 180,968,288.30/15,521.97
  6. Step 6: Final answer
    x = 11,658.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.