Home / 8,420.68-12,631-2,871.36

Finding the Fourth Proportional to 8,420.68, 12,631 and 2,871.36

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Solution

The fourth proportional to 8,420.68, 12,631 and 2,871.36 is: 4,307.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.68 : 12,631 = 2,871.36 : x
  2. Step 2: Convert to fraction form
    8,420.68/12,631 = 2,871.36/x
  3. Step 3: Cross multiply
    8,420.68x = 12,631 × 2,871.36
  4. Step 4: Simplify right side
    8,420.68x = 36,268,148.16
  5. Step 5: Solve for x
    x = 36,268,148.16/8,420.68
  6. Step 6: Final answer
    x = 4,307.03

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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.