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Finding the Fourth Proportional to 5,827.64, 8,739.57 and 1,931

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Solution

The fourth proportional to 5,827.64, 8,739.57 and 1,931 is: 2,895.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,827.64 : 8,739.57 = 1,931 : x
  2. Step 2: Convert to fraction form
    5,827.64/8,739.57 = 1,931/x
  3. Step 3: Cross multiply
    5,827.64x = 8,739.57 × 1,931
  4. Step 4: Simplify right side
    5,827.64x = 16,876,109.67
  5. Step 5: Solve for x
    x = 16,876,109.67/5,827.64
  6. Step 6: Final answer
    x = 2,895.87

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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.