Home / 13,920.43-20,880.71-4,059.76

Finding the Fourth Proportional to 13,920.43, 20,880.71 and 4,059.76

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Solution

The fourth proportional to 13,920.43, 20,880.71 and 4,059.76 is: 6,089.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.43 : 20,880.71 = 4,059.76 : x
  2. Step 2: Convert to fraction form
    13,920.43/20,880.71 = 4,059.76/x
  3. Step 3: Cross multiply
    13,920.43x = 20,880.71 × 4,059.76
  4. Step 4: Simplify right side
    13,920.43x = 84,770,671.23
  5. Step 5: Solve for x
    x = 84,770,671.23/13,920.43
  6. Step 6: Final answer
    x = 6,089.66

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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.