Home / 30,983.91-42,758.45-18,408.66

Finding the Fourth Proportional to 30,983.91, 42,758.45 and 18,408.66

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Solution

The fourth proportional to 30,983.91, 42,758.45 and 18,408.66 is: 25,404.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,983.91 : 42,758.45 = 18,408.66 : x
  2. Step 2: Convert to fraction form
    30,983.91/42,758.45 = 18,408.66/x
  3. Step 3: Cross multiply
    30,983.91x = 42,758.45 × 18,408.66
  4. Step 4: Simplify right side
    30,983.91x = 787,125,768.18
  5. Step 5: Solve for x
    x = 787,125,768.18/30,983.91
  6. Step 6: Final answer
    x = 25,404.34

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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.