Home / 21,150.72-29,187.90-11,719.26

Finding the Fourth Proportional to 21,150.72, 29,187.90 and 11,719.26

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Solution

The fourth proportional to 21,150.72, 29,187.90 and 11,719.26 is: 16,172.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.72 : 29,187.90 = 11,719.26 : x
  2. Step 2: Convert to fraction form
    21,150.72/29,187.90 = 11,719.26/x
  3. Step 3: Cross multiply
    21,150.72x = 29,187.90 × 11,719.26
  4. Step 4: Simplify right side
    21,150.72x = 342,060,588.95
  5. Step 5: Solve for x
    x = 342,060,588.95/21,150.72
  6. Step 6: Final answer
    x = 16,172.53

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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.