Home / 13,613.52-20,420.82-4,254.42

Finding the Fourth Proportional to 13,613.52, 20,420.82 and 4,254.42

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Solution

The fourth proportional to 13,613.52, 20,420.82 and 4,254.42 is: 6,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.52 : 20,420.82 = 4,254.42 : x
  2. Step 2: Convert to fraction form
    13,613.52/20,420.82 = 4,254.42/x
  3. Step 3: Cross multiply
    13,613.52x = 20,420.82 × 4,254.42
  4. Step 4: Simplify right side
    13,613.52x = 86,878,745.02
  5. Step 5: Solve for x
    x = 86,878,745.02/13,613.52
  6. Step 6: Final answer
    x = 6,381.80

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1.5x scale

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.