Home / 15,521.88-21,420.18-8,448.33

Finding the Fourth Proportional to 15,521.88, 21,420.18 and 8,448.33

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Solution

The fourth proportional to 15,521.88, 21,420.18 and 8,448.33 is: 11,658.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.88 : 21,420.18 = 8,448.33 : x
  2. Step 2: Convert to fraction form
    15,521.88/21,420.18 = 8,448.33/x
  3. Step 3: Cross multiply
    15,521.88x = 21,420.18 × 8,448.33
  4. Step 4: Simplify right side
    15,521.88x = 180,964,749.30
  5. Step 5: Solve for x
    x = 180,964,749.30/15,521.88
  6. Step 6: Final answer
    x = 11,658.69

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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.