Home / 12,909.63-19,361.71-4,142.49

Finding the Fourth Proportional to 12,909.63, 19,361.71 and 4,142.49

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Solution

The fourth proportional to 12,909.63, 19,361.71 and 4,142.49 is: 6,212.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.63 : 19,361.71 = 4,142.49 : x
  2. Step 2: Convert to fraction form
    12,909.63/19,361.71 = 4,142.49/x
  3. Step 3: Cross multiply
    12,909.63x = 19,361.71 × 4,142.49
  4. Step 4: Simplify right side
    12,909.63x = 80,205,785.99
  5. Step 5: Solve for x
    x = 80,205,785.99/12,909.63
  6. Step 6: Final answer
    x = 6,212.86

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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.