Home / 21,151.53-29,188.89-11,720.03

Finding the Fourth Proportional to 21,151.53, 29,188.89 and 11,720.03

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Solution

The fourth proportional to 21,151.53, 29,188.89 and 11,720.03 is: 16,173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.53 : 29,188.89 = 11,720.03 : x
  2. Step 2: Convert to fraction form
    21,151.53/29,188.89 = 11,720.03/x
  3. Step 3: Cross multiply
    21,151.53x = 29,188.89 × 11,720.03
  4. Step 4: Simplify right side
    21,151.53x = 342,094,520.52
  5. Step 5: Solve for x
    x = 342,094,520.52/21,151.53
  6. Step 6: Final answer
    x = 16,173.51

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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.