Home / 15,521.82-21,420.50-8,448.64

Finding the Fourth Proportional to 15,521.82, 21,420.50 and 8,448.64

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Solution

The fourth proportional to 15,521.82, 21,420.50 and 8,448.64 is: 11,659.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.82 : 21,420.50 = 8,448.64 : x
  2. Step 2: Convert to fraction form
    15,521.82/21,420.50 = 8,448.64/x
  3. Step 3: Cross multiply
    15,521.82x = 21,420.50 × 8,448.64
  4. Step 4: Simplify right side
    15,521.82x = 180,974,093.12
  5. Step 5: Solve for x
    x = 180,974,093.12/15,521.82
  6. Step 6: Final answer
    x = 11,659.33

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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.