Home / 30,180.62-45,238.10-12,629.94

Finding the Fourth Proportional to 30,180.62, 45,238.10 and 12,629.94

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Solution

The fourth proportional to 30,180.62, 45,238.10 and 12,629.94 is: 18,931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,180.62 : 45,238.10 = 12,629.94 : x
  2. Step 2: Convert to fraction form
    30,180.62/45,238.10 = 12,629.94/x
  3. Step 3: Cross multiply
    30,180.62x = 45,238.10 × 12,629.94
  4. Step 4: Simplify right side
    30,180.62x = 571,354,425.56
  5. Step 5: Solve for x
    x = 571,354,425.56/30,180.62
  6. Step 6: Final answer
    x = 18,931.17

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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.