Home / 13,420.60-20,133.80-4,059.88

Finding the Fourth Proportional to 13,420.60, 20,133.80 and 4,059.88

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Solution

The fourth proportional to 13,420.60, 20,133.80 and 4,059.88 is: 6,090.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.60 : 20,133.80 = 4,059.88 : x
  2. Step 2: Convert to fraction form
    13,420.60/20,133.80 = 4,059.88/x
  3. Step 3: Cross multiply
    13,420.60x = 20,133.80 × 4,059.88
  4. Step 4: Simplify right side
    13,420.60x = 81,740,811.94
  5. Step 5: Solve for x
    x = 81,740,811.94/13,420.60
  6. Step 6: Final answer
    x = 6,090.70

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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.