Home / 30,198.78-45,265.41-12,648.15

Finding the Fourth Proportional to 30,198.78, 45,265.41 and 12,648.15

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Solution

The fourth proportional to 30,198.78, 45,265.41 and 12,648.15 is: 18,958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,198.78 : 45,265.41 = 12,648.15 : x
  2. Step 2: Convert to fraction form
    30,198.78/45,265.41 = 12,648.15/x
  3. Step 3: Cross multiply
    30,198.78x = 45,265.41 × 12,648.15
  4. Step 4: Simplify right side
    30,198.78x = 572,523,695.49
  5. Step 5: Solve for x
    x = 572,523,695.49/30,198.78
  6. Step 6: Final answer
    x = 18,958.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.