Home / 15,521.72-21,419.87-8,448.26

Finding the Fourth Proportional to 15,521.72, 21,419.87 and 8,448.26

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Solution

The fourth proportional to 15,521.72, 21,419.87 and 8,448.26 is: 11,658.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.72 : 21,419.87 = 8,448.26 : x
  2. Step 2: Convert to fraction form
    15,521.72/21,419.87 = 8,448.26/x
  3. Step 3: Cross multiply
    15,521.72x = 21,419.87 × 8,448.26
  4. Step 4: Simplify right side
    15,521.72x = 180,960,481.59
  5. Step 5: Solve for x
    x = 180,960,481.59/15,521.72
  6. Step 6: Final answer
    x = 11,658.54

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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.