Home / 21,180.48-29,229.84-12,795.36

Finding the Fourth Proportional to 21,180.48, 29,229.84 and 12,795.36

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Solution

The fourth proportional to 21,180.48, 29,229.84 and 12,795.36 is: 17,658.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.48 : 29,229.84 = 12,795.36 : x
  2. Step 2: Convert to fraction form
    21,180.48/29,229.84 = 12,795.36/x
  3. Step 3: Cross multiply
    21,180.48x = 29,229.84 × 12,795.36
  4. Step 4: Simplify right side
    21,180.48x = 374,006,325.54
  5. Step 5: Solve for x
    x = 374,006,325.54/21,180.48
  6. Step 6: Final answer
    x = 17,658.07

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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.