Home / 30,811.92-42,520.68-18,065.43

Finding the Fourth Proportional to 30,811.92, 42,520.68 and 18,065.43

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Solution

The fourth proportional to 30,811.92, 42,520.68 and 18,065.43 is: 24,930.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.92 : 42,520.68 = 18,065.43 : x
  2. Step 2: Convert to fraction form
    30,811.92/42,520.68 = 18,065.43/x
  3. Step 3: Cross multiply
    30,811.92x = 42,520.68 × 18,065.43
  4. Step 4: Simplify right side
    30,811.92x = 768,154,155.49
  5. Step 5: Solve for x
    x = 768,154,155.49/30,811.92
  6. Step 6: Final answer
    x = 24,930.43

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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.