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Finding the Fourth Proportional to 5,176.71, 7,143.90 and 2,818.90

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Solution

The fourth proportional to 5,176.71, 7,143.90 and 2,818.90 is: 3,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,176.71 : 7,143.90 = 2,818.90 : x
  2. Step 2: Convert to fraction form
    5,176.71/7,143.90 = 2,818.90/x
  3. Step 3: Cross multiply
    5,176.71x = 7,143.90 × 2,818.90
  4. Step 4: Simplify right side
    5,176.71x = 20,137,938.07
  5. Step 5: Solve for x
    x = 20,137,938.07/5,176.71
  6. Step 6: Final answer
    x = 3,890.10

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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.