Home / 5,618.16-8,428.68-2,156.40

Finding the Fourth Proportional to 5,618.16, 8,428.68 and 2,156.40

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Solution

The fourth proportional to 5,618.16, 8,428.68 and 2,156.40 is: 3,235.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.16 : 8,428.68 = 2,156.40 : x
  2. Step 2: Convert to fraction form
    5,618.16/8,428.68 = 2,156.40/x
  3. Step 3: Cross multiply
    5,618.16x = 8,428.68 × 2,156.40
  4. Step 4: Simplify right side
    5,618.16x = 18,175,605.55
  5. Step 5: Solve for x
    x = 18,175,605.55/5,618.16
  6. Step 6: Final answer
    x = 3,235.15

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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.