Home / 8,420.72-12,629.38-2,871.06

Finding the Fourth Proportional to 8,420.72, 12,629.38 and 2,871.06

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Solution

The fourth proportional to 8,420.72, 12,629.38 and 2,871.06 is: 4,306.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.72 : 12,629.38 = 2,871.06 : x
  2. Step 2: Convert to fraction form
    8,420.72/12,629.38 = 2,871.06/x
  3. Step 3: Cross multiply
    8,420.72x = 12,629.38 × 2,871.06
  4. Step 4: Simplify right side
    8,420.72x = 36,259,630.24
  5. Step 5: Solve for x
    x = 36,259,630.24/8,420.72
  6. Step 6: Final answer
    x = 4,306.00

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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.