Home / 30,220.13-41,660.46-21,239.76

Finding the Fourth Proportional to 30,220.13, 41,660.46 and 21,239.76

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Solution

The fourth proportional to 30,220.13, 41,660.46 and 21,239.76 is: 29,280.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,220.13 : 41,660.46 = 21,239.76 : x
  2. Step 2: Convert to fraction form
    30,220.13/41,660.46 = 21,239.76/x
  3. Step 3: Cross multiply
    30,220.13x = 41,660.46 × 21,239.76
  4. Step 4: Simplify right side
    30,220.13x = 884,858,171.89
  5. Step 5: Solve for x
    x = 884,858,171.89/30,220.13
  6. Step 6: Final answer
    x = 29,280.42

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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.