Home / 20,601.60-30,900.26-13,980.60

Finding the Fourth Proportional to 20,601.60, 30,900.26 and 13,980.60

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Solution

The fourth proportional to 20,601.60, 30,900.26 and 13,980.60 is: 20,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.60 : 30,900.26 = 13,980.60 : x
  2. Step 2: Convert to fraction form
    20,601.60/30,900.26 = 13,980.60/x
  3. Step 3: Cross multiply
    20,601.60x = 30,900.26 × 13,980.60
  4. Step 4: Simplify right side
    20,601.60x = 432,004,174.96
  5. Step 5: Solve for x
    x = 432,004,174.96/20,601.60
  6. Step 6: Final answer
    x = 20,969.45

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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.