Home / 5,618.72-8,428.08-2,156.78

Finding the Fourth Proportional to 5,618.72, 8,428.08 and 2,156.78

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Solution

The fourth proportional to 5,618.72, 8,428.08 and 2,156.78 is: 3,235.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.72 : 8,428.08 = 2,156.78 : x
  2. Step 2: Convert to fraction form
    5,618.72/8,428.08 = 2,156.78/x
  3. Step 3: Cross multiply
    5,618.72x = 8,428.08 × 2,156.78
  4. Step 4: Simplify right side
    5,618.72x = 18,177,514.38
  5. Step 5: Solve for x
    x = 18,177,514.38/5,618.72
  6. Step 6: Final answer
    x = 3,235.17

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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.