Home / 13,845.40-20,768.10-5,086.60

Finding the Fourth Proportional to 13,845.40, 20,768.10 and 5,086.60

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Solution

The fourth proportional to 13,845.40, 20,768.10 and 5,086.60 is: 7,629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,845.40 : 20,768.10 = 5,086.60 : x
  2. Step 2: Convert to fraction form
    13,845.40/20,768.10 = 5,086.60/x
  3. Step 3: Cross multiply
    13,845.40x = 20,768.10 × 5,086.60
  4. Step 4: Simplify right side
    13,845.40x = 105,639,017.46
  5. Step 5: Solve for x
    x = 105,639,017.46/13,845.40
  6. Step 6: Final answer
    x = 7,629.90

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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.