Home / 21,720.96-29,989.44-14,644.80

Finding the Fourth Proportional to 21,720.96, 29,989.44 and 14,644.80

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Solution

The fourth proportional to 21,720.96, 29,989.44 and 14,644.80 is: 20,219.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.96 : 29,989.44 = 14,644.80 : x
  2. Step 2: Convert to fraction form
    21,720.96/29,989.44 = 14,644.80/x
  3. Step 3: Cross multiply
    21,720.96x = 29,989.44 × 14,644.80
  4. Step 4: Simplify right side
    21,720.96x = 439,189,350.91
  5. Step 5: Solve for x
    x = 439,189,350.91/21,720.96
  6. Step 6: Final answer
    x = 20,219.61

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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.