Home / 30,963.49-42,747.35-20,383.88

Finding the Fourth Proportional to 30,963.49, 42,747.35 and 20,383.88

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Solution

The fourth proportional to 30,963.49, 42,747.35 and 20,383.88 is: 28,141.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.49 : 42,747.35 = 20,383.88 : x
  2. Step 2: Convert to fraction form
    30,963.49/42,747.35 = 20,383.88/x
  3. Step 3: Cross multiply
    30,963.49x = 42,747.35 × 20,383.88
  4. Step 4: Simplify right side
    30,963.49x = 871,356,537.06
  5. Step 5: Solve for x
    x = 871,356,537.06/30,963.49
  6. Step 6: Final answer
    x = 28,141.42

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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.