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Finding the Fourth Proportional to 5,662.28, 7,813.38 and 3,143.78

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Solution

The fourth proportional to 5,662.28, 7,813.38 and 3,143.78 is: 4,338.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,662.28 : 7,813.38 = 3,143.78 : x
  2. Step 2: Convert to fraction form
    5,662.28/7,813.38 = 3,143.78/x
  3. Step 3: Cross multiply
    5,662.28x = 7,813.38 × 3,143.78
  4. Step 4: Simplify right side
    5,662.28x = 24,563,547.78
  5. Step 5: Solve for x
    x = 24,563,547.78/5,662.28
  6. Step 6: Final answer
    x = 4,338.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.