Home / 12,886.86-19,332.72-4,119.42

Finding the Fourth Proportional to 12,886.86, 19,332.72 and 4,119.42

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Solution

The fourth proportional to 12,886.86, 19,332.72 and 4,119.42 is: 6,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.86 : 19,332.72 = 4,119.42 : x
  2. Step 2: Convert to fraction form
    12,886.86/19,332.72 = 4,119.42/x
  3. Step 3: Cross multiply
    12,886.86x = 19,332.72 × 4,119.42
  4. Step 4: Simplify right side
    12,886.86x = 79,639,593.42
  5. Step 5: Solve for x
    x = 79,639,593.42/12,886.86
  6. Step 6: Final answer
    x = 6,179.91

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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.