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Finding the Fourth Proportional to 5,158.72, 7,739.23 and 1,871.74

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Solution

The fourth proportional to 5,158.72, 7,739.23 and 1,871.74 is: 2,808.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.72 : 7,739.23 = 1,871.74 : x
  2. Step 2: Convert to fraction form
    5,158.72/7,739.23 = 1,871.74/x
  3. Step 3: Cross multiply
    5,158.72x = 7,739.23 × 1,871.74
  4. Step 4: Simplify right side
    5,158.72x = 14,485,834.86
  5. Step 5: Solve for x
    x = 14,485,834.86/5,158.72
  6. Step 6: Final answer
    x = 2,808.03

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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.