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Finding the Fourth Proportional to 5,821.56, 8,690.07 and 5,387.90

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Solution

The fourth proportional to 5,821.56, 8,690.07 and 5,387.90 is: 8,042.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,821.56 : 8,690.07 = 5,387.90 : x
  2. Step 2: Convert to fraction form
    5,821.56/8,690.07 = 5,387.90/x
  3. Step 3: Cross multiply
    5,821.56x = 8,690.07 × 5,387.90
  4. Step 4: Simplify right side
    5,821.56x = 46,821,204.91
  5. Step 5: Solve for x
    x = 46,821,204.91/5,821.56
  6. Step 6: Final answer
    x = 8,042.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.