Home / 5,618.81-8,428.62-2,156.06

Finding the Fourth Proportional to 5,618.81, 8,428.62 and 2,156.06

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Solution

The fourth proportional to 5,618.81, 8,428.62 and 2,156.06 is: 3,234.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.81 : 8,428.62 = 2,156.06 : x
  2. Step 2: Convert to fraction form
    5,618.81/8,428.62 = 2,156.06/x
  3. Step 3: Cross multiply
    5,618.81x = 8,428.62 × 2,156.06
  4. Step 4: Simplify right side
    5,618.81x = 18,172,639.59
  5. Step 5: Solve for x
    x = 18,172,639.59/5,618.81
  6. Step 6: Final answer
    x = 3,234.25

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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.