Home / 30,660.33-42,343.38-21,125.01

Finding the Fourth Proportional to 30,660.33, 42,343.38 and 21,125.01

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Solution

The fourth proportional to 30,660.33, 42,343.38 and 21,125.01 is: 29,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.33 : 42,343.38 = 21,125.01 : x
  2. Step 2: Convert to fraction form
    30,660.33/42,343.38 = 21,125.01/x
  3. Step 3: Cross multiply
    30,660.33x = 42,343.38 × 21,125.01
  4. Step 4: Simplify right side
    30,660.33x = 894,504,325.93
  5. Step 5: Solve for x
    x = 894,504,325.93/30,660.33
  6. Step 6: Final answer
    x = 29,174.65

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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.