Home / 13,936.80-20,905.88-5,615.69

Finding the Fourth Proportional to 13,936.80, 20,905.88 and 5,615.69

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Solution

The fourth proportional to 13,936.80, 20,905.88 and 5,615.69 is: 8,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,936.80 : 20,905.88 = 5,615.69 : x
  2. Step 2: Convert to fraction form
    13,936.80/20,905.88 = 5,615.69/x
  3. Step 3: Cross multiply
    13,936.80x = 20,905.88 × 5,615.69
  4. Step 4: Simplify right side
    13,936.80x = 117,400,808.65
  5. Step 5: Solve for x
    x = 117,400,808.65/13,936.80
  6. Step 6: Final answer
    x = 8,423.80

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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.