Home / 13,613.72-20,420.56-4,254.54

Finding the Fourth Proportional to 13,613.72, 20,420.56 and 4,254.54

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Solution

The fourth proportional to 13,613.72, 20,420.56 and 4,254.54 is: 6,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.72 : 20,420.56 = 4,254.54 : x
  2. Step 2: Convert to fraction form
    13,613.72/20,420.56 = 4,254.54/x
  3. Step 3: Cross multiply
    13,613.72x = 20,420.56 × 4,254.54
  4. Step 4: Simplify right side
    13,613.72x = 86,880,089.34
  5. Step 5: Solve for x
    x = 86,880,089.34/13,613.72
  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.