Home / 13,489.40-20,234.10-12,668.60

Finding the Fourth Proportional to 13,489.40, 20,234.10 and 12,668.60

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Solution

The fourth proportional to 13,489.40, 20,234.10 and 12,668.60 is: 19,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.40 : 20,234.10 = 12,668.60 : x
  2. Step 2: Convert to fraction form
    13,489.40/20,234.10 = 12,668.60/x
  3. Step 3: Cross multiply
    13,489.40x = 20,234.10 × 12,668.60
  4. Step 4: Simplify right side
    13,489.40x = 256,337,719.26
  5. Step 5: Solve for x
    x = 256,337,719.26/13,489.40
  6. Step 6: Final answer
    x = 19,002.90

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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.