Home / 30,983.20-42,760.50-18,408

Finding the Fourth Proportional to 30,983.20, 42,760.50 and 18,408

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Solution

The fourth proportional to 30,983.20, 42,760.50 and 18,408 is: 25,405.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,983.20 : 42,760.50 = 18,408 : x
  2. Step 2: Convert to fraction form
    30,983.20/42,760.50 = 18,408/x
  3. Step 3: Cross multiply
    30,983.20x = 42,760.50 × 18,408
  4. Step 4: Simplify right side
    30,983.20x = 787,135,284
  5. Step 5: Solve for x
    x = 787,135,284/30,983.20
  6. Step 6: Final answer
    x = 25,405.23

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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.