Home / 21,151.72-29,189.28-11,720.26

Finding the Fourth Proportional to 21,151.72, 29,189.28 and 11,720.26

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Solution

The fourth proportional to 21,151.72, 29,189.28 and 11,720.26 is: 16,173.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.72 : 29,189.28 = 11,720.26 : x
  2. Step 2: Convert to fraction form
    21,151.72/29,189.28 = 11,720.26/x
  3. Step 3: Cross multiply
    21,151.72x = 29,189.28 × 11,720.26
  4. Step 4: Simplify right side
    21,151.72x = 342,105,950.81
  5. Step 5: Solve for x
    x = 342,105,950.81/21,151.72
  6. Step 6: Final answer
    x = 16,173.91

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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.