Home / 12,141.81-18,219.79-5,121.39

Finding the Fourth Proportional to 12,141.81, 18,219.79 and 5,121.39

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Solution

The fourth proportional to 12,141.81, 18,219.79 and 5,121.39 is: 7,685.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,141.81 : 18,219.79 = 5,121.39 : x
  2. Step 2: Convert to fraction form
    12,141.81/18,219.79 = 5,121.39/x
  3. Step 3: Cross multiply
    12,141.81x = 18,219.79 × 5,121.39
  4. Step 4: Simplify right side
    12,141.81x = 93,310,650.31
  5. Step 5: Solve for x
    x = 93,310,650.31/12,141.81
  6. Step 6: Final answer
    x = 7,685.07

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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.