Home / 13,339.55-20,012.19-3,980.30

Finding the Fourth Proportional to 13,339.55, 20,012.19 and 3,980.30

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Solution

The fourth proportional to 13,339.55, 20,012.19 and 3,980.30 is: 5,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.55 : 20,012.19 = 3,980.30 : x
  2. Step 2: Convert to fraction form
    13,339.55/20,012.19 = 3,980.30/x
  3. Step 3: Cross multiply
    13,339.55x = 20,012.19 × 3,980.30
  4. Step 4: Simplify right side
    13,339.55x = 79,654,549.99
  5. Step 5: Solve for x
    x = 79,654,549.99/13,339.55
  6. Step 6: Final answer
    x = 5,971.31

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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.