Home / 21,151.44-29,189.64-11,720.40

Finding the Fourth Proportional to 21,151.44, 29,189.64 and 11,720.40

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Solution

The fourth proportional to 21,151.44, 29,189.64 and 11,720.40 is: 16,174.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.44 : 29,189.64 = 11,720.40 : x
  2. Step 2: Convert to fraction form
    21,151.44/29,189.64 = 11,720.40/x
  3. Step 3: Cross multiply
    21,151.44x = 29,189.64 × 11,720.40
  4. Step 4: Simplify right side
    21,151.44x = 342,114,256.66
  5. Step 5: Solve for x
    x = 342,114,256.66/21,151.44
  6. Step 6: Final answer
    x = 16,174.51

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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.