Home / 21,151.79-29,190.63-11,720.15

Finding the Fourth Proportional to 21,151.79, 29,190.63 and 11,720.15

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Solution

The fourth proportional to 21,151.79, 29,190.63 and 11,720.15 is: 16,174.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.79 : 29,190.63 = 11,720.15 : x
  2. Step 2: Convert to fraction form
    21,151.79/29,190.63 = 11,720.15/x
  3. Step 3: Cross multiply
    21,151.79x = 29,190.63 × 11,720.15
  4. Step 4: Simplify right side
    21,151.79x = 342,118,357.64
  5. Step 5: Solve for x
    x = 342,118,357.64/21,151.79
  6. Step 6: Final answer
    x = 16,174.44

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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.