Home / 5,618.15-8,428.30-2,155.13

Finding the Fourth Proportional to 5,618.15, 8,428.30 and 2,155.13

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Solution

The fourth proportional to 5,618.15, 8,428.30 and 2,155.13 is: 3,233.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.15 : 8,428.30 = 2,155.13 : x
  2. Step 2: Convert to fraction form
    5,618.15/8,428.30 = 2,155.13/x
  3. Step 3: Cross multiply
    5,618.15x = 8,428.30 × 2,155.13
  4. Step 4: Simplify right side
    5,618.15x = 18,164,042.73
  5. Step 5: Solve for x
    x = 18,164,042.73/5,618.15
  6. Step 6: Final answer
    x = 3,233.10

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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.