Home / 30,221.13-41,661.84-21,240.76

Finding the Fourth Proportional to 30,221.13, 41,661.84 and 21,240.76

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Solution

The fourth proportional to 30,221.13, 41,661.84 and 21,240.76 is: 29,281.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,221.13 : 41,661.84 = 21,240.76 : x
  2. Step 2: Convert to fraction form
    30,221.13/41,661.84 = 21,240.76/x
  3. Step 3: Cross multiply
    30,221.13x = 41,661.84 × 21,240.76
  4. Step 4: Simplify right side
    30,221.13x = 884,929,144.60
  5. Step 5: Solve for x
    x = 884,929,144.60/30,221.13
  6. Step 6: Final answer
    x = 29,281.80

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Double scale
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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.