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Finding the Fourth Proportional to 21,911.91, 30,242.22 and 21,182.91

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Solution

The fourth proportional to 21,911.91, 30,242.22 and 21,182.91 is: 29,236.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.91 : 30,242.22 = 21,182.91 : x
  2. Step 2: Convert to fraction form
    21,911.91/30,242.22 = 21,182.91/x
  3. Step 3: Cross multiply
    21,911.91x = 30,242.22 × 21,182.91
  4. Step 4: Simplify right side
    21,911.91x = 640,618,224.46
  5. Step 5: Solve for x
    x = 640,618,224.46/21,911.91
  6. Step 6: Final answer
    x = 29,236.07

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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.