Home / 13,913.92-20,877.68-6,121.76

Finding the Fourth Proportional to 13,913.92, 20,877.68 and 6,121.76

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Solution

The fourth proportional to 13,913.92, 20,877.68 and 6,121.76 is: 9,185.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.92 : 20,877.68 = 6,121.76 : x
  2. Step 2: Convert to fraction form
    13,913.92/20,877.68 = 6,121.76/x
  3. Step 3: Cross multiply
    13,913.92x = 20,877.68 × 6,121.76
  4. Step 4: Simplify right side
    13,913.92x = 127,808,146.32
  5. Step 5: Solve for x
    x = 127,808,146.32/13,913.92
  6. Step 6: Final answer
    x = 9,185.63

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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.