Home / 30,644.19-42,305.13-20,625.30

Finding the Fourth Proportional to 30,644.19, 42,305.13 and 20,625.30

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Solution

The fourth proportional to 30,644.19, 42,305.13 and 20,625.30 is: 28,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,644.19 : 42,305.13 = 20,625.30 : x
  2. Step 2: Convert to fraction form
    30,644.19/42,305.13 = 20,625.30/x
  3. Step 3: Cross multiply
    30,644.19x = 42,305.13 × 20,625.30
  4. Step 4: Simplify right side
    30,644.19x = 872,555,997.79
  5. Step 5: Solve for x
    x = 872,555,997.79/30,644.19
  6. Step 6: Final answer
    x = 28,473.78

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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.