Home / 30,760.17-42,441.21-18,819.15

Finding the Fourth Proportional to 30,760.17, 42,441.21 and 18,819.15

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Solution

The fourth proportional to 30,760.17, 42,441.21 and 18,819.15 is: 25,965.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,760.17 : 42,441.21 = 18,819.15 : x
  2. Step 2: Convert to fraction form
    30,760.17/42,441.21 = 18,819.15/x
  3. Step 3: Cross multiply
    30,760.17x = 42,441.21 × 18,819.15
  4. Step 4: Simplify right side
    30,760.17x = 798,707,497.17
  5. Step 5: Solve for x
    x = 798,707,497.17/30,760.17
  6. Step 6: Final answer
    x = 25,965.64

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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.