Home / 8,420.52-12,629.88-2,581.20

Finding the Fourth Proportional to 8,420.52, 12,629.88 and 2,581.20

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Solution

The fourth proportional to 8,420.52, 12,629.88 and 2,581.20 is: 3,871.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.52 : 12,629.88 = 2,581.20 : x
  2. Step 2: Convert to fraction form
    8,420.52/12,629.88 = 2,581.20/x
  3. Step 3: Cross multiply
    8,420.52x = 12,629.88 × 2,581.20
  4. Step 4: Simplify right side
    8,420.52x = 32,600,246.26
  5. Step 5: Solve for x
    x = 32,600,246.26/8,420.52
  6. Step 6: Final answer
    x = 3,871.52

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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.