Home / 30,921.75-42,655.01-21,982.59

Finding the Fourth Proportional to 30,921.75, 42,655.01 and 21,982.59

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Solution

The fourth proportional to 30,921.75, 42,655.01 and 21,982.59 is: 30,323.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,921.75 : 42,655.01 = 21,982.59 : x
  2. Step 2: Convert to fraction form
    30,921.75/42,655.01 = 21,982.59/x
  3. Step 3: Cross multiply
    30,921.75x = 42,655.01 × 21,982.59
  4. Step 4: Simplify right side
    30,921.75x = 937,667,486.36
  5. Step 5: Solve for x
    x = 937,667,486.36/30,921.75
  6. Step 6: Final answer
    x = 30,323.88

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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.