Home / 30,774.15-42,447.17-18,843.35

Finding the Fourth Proportional to 30,774.15, 42,447.17 and 18,843.35

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Solution

The fourth proportional to 30,774.15, 42,447.17 and 18,843.35 is: 25,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,774.15 : 42,447.17 = 18,843.35 : x
  2. Step 2: Convert to fraction form
    30,774.15/42,447.17 = 18,843.35/x
  3. Step 3: Cross multiply
    30,774.15x = 42,447.17 × 18,843.35
  4. Step 4: Simplify right side
    30,774.15x = 799,846,574.37
  5. Step 5: Solve for x
    x = 799,846,574.37/30,774.15
  6. Step 6: Final answer
    x = 25,990.86

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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.