Home / 12,881.88-19,315.71-3,994.75

Finding the Fourth Proportional to 12,881.88, 19,315.71 and 3,994.75

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Solution

The fourth proportional to 12,881.88, 19,315.71 and 3,994.75 is: 5,989.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.88 : 19,315.71 = 3,994.75 : x
  2. Step 2: Convert to fraction form
    12,881.88/19,315.71 = 3,994.75/x
  3. Step 3: Cross multiply
    12,881.88x = 19,315.71 × 3,994.75
  4. Step 4: Simplify right side
    12,881.88x = 77,161,432.52
  5. Step 5: Solve for x
    x = 77,161,432.52/12,881.88
  6. Step 6: Final answer
    x = 5,989.92

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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.