Home / 13,279.20-19,921.20-6,688.80

Finding the Fourth Proportional to 13,279.20, 19,921.20 and 6,688.80

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Solution

The fourth proportional to 13,279.20, 19,921.20 and 6,688.80 is: 10,034.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.20 : 19,921.20 = 6,688.80 : x
  2. Step 2: Convert to fraction form
    13,279.20/19,921.20 = 6,688.80/x
  3. Step 3: Cross multiply
    13,279.20x = 19,921.20 × 6,688.80
  4. Step 4: Simplify right side
    13,279.20x = 133,248,922.56
  5. Step 5: Solve for x
    x = 133,248,922.56/13,279.20
  6. Step 6: Final answer
    x = 10,034.41

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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.