Home / 30,934.11-42,662.72-20,849.30

Finding the Fourth Proportional to 30,934.11, 42,662.72 and 20,849.30

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Solution

The fourth proportional to 30,934.11, 42,662.72 and 20,849.30 is: 28,754.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,934.11 : 42,662.72 = 20,849.30 : x
  2. Step 2: Convert to fraction form
    30,934.11/42,662.72 = 20,849.30/x
  3. Step 3: Cross multiply
    30,934.11x = 42,662.72 × 20,849.30
  4. Step 4: Simplify right side
    30,934.11x = 889,487,686.91
  5. Step 5: Solve for x
    x = 889,487,686.91/30,934.11
  6. Step 6: Final answer
    x = 28,754.27

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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.