Home / 30,138.10-45,212.82-12,127.69

Finding the Fourth Proportional to 30,138.10, 45,212.82 and 12,127.69

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Solution

The fourth proportional to 30,138.10, 45,212.82 and 12,127.69 is: 18,193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,138.10 : 45,212.82 = 12,127.69 : x
  2. Step 2: Convert to fraction form
    30,138.10/45,212.82 = 12,127.69/x
  3. Step 3: Cross multiply
    30,138.10x = 45,212.82 × 12,127.69
  4. Step 4: Simplify right side
    30,138.10x = 548,327,064.99
  5. Step 5: Solve for x
    x = 548,327,064.99/30,138.10
  6. Step 6: Final answer
    x = 18,193.82

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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.