Home / 11,618.94-17,428.60-4,218.78

Finding the Fourth Proportional to 11,618.94, 17,428.60 and 4,218.78

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Solution

The fourth proportional to 11,618.94, 17,428.60 and 4,218.78 is: 6,328.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,618.94 : 17,428.60 = 4,218.78 : x
  2. Step 2: Convert to fraction form
    11,618.94/17,428.60 = 4,218.78/x
  3. Step 3: Cross multiply
    11,618.94x = 17,428.60 × 4,218.78
  4. Step 4: Simplify right side
    11,618.94x = 73,527,429.11
  5. Step 5: Solve for x
    x = 73,527,429.11/11,618.94
  6. Step 6: Final answer
    x = 6,328.24

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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.