Home / 30,717.45-42,379.52-18,621.83

Finding the Fourth Proportional to 30,717.45, 42,379.52 and 18,621.83

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Solution

The fourth proportional to 30,717.45, 42,379.52 and 18,621.83 is: 25,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,717.45 : 42,379.52 = 18,621.83 : x
  2. Step 2: Convert to fraction form
    30,717.45/42,379.52 = 18,621.83/x
  3. Step 3: Cross multiply
    30,717.45x = 42,379.52 × 18,621.83
  4. Step 4: Simplify right side
    30,717.45x = 789,184,229.76
  5. Step 5: Solve for x
    x = 789,184,229.76/30,717.45
  6. Step 6: Final answer
    x = 25,691.72

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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.