Home / 10,121.74-15,178.96-4,278.80

Finding the Fourth Proportional to 10,121.74, 15,178.96 and 4,278.80

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Solution

The fourth proportional to 10,121.74, 15,178.96 and 4,278.80 is: 6,416.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.74 : 15,178.96 = 4,278.80 : x
  2. Step 2: Convert to fraction form
    10,121.74/15,178.96 = 4,278.80/x
  3. Step 3: Cross multiply
    10,121.74x = 15,178.96 × 4,278.80
  4. Step 4: Simplify right side
    10,121.74x = 64,947,712.65
  5. Step 5: Solve for x
    x = 64,947,712.65/10,121.74
  6. Step 6: Final answer
    x = 6,416.66

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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.