Home / 30,932.08-42,721.25-20,843.01

Finding the Fourth Proportional to 30,932.08, 42,721.25 and 20,843.01

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Solution

The fourth proportional to 30,932.08, 42,721.25 and 20,843.01 is: 28,786.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,932.08 : 42,721.25 = 20,843.01 : x
  2. Step 2: Convert to fraction form
    30,932.08/42,721.25 = 20,843.01/x
  3. Step 3: Cross multiply
    30,932.08x = 42,721.25 × 20,843.01
  4. Step 4: Simplify right side
    30,932.08x = 890,439,336.75
  5. Step 5: Solve for x
    x = 890,439,336.75/30,932.08
  6. Step 6: Final answer
    x = 28,786.92

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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.