Home / 13,988.39-20,986.25-5,223.38

Finding the Fourth Proportional to 13,988.39, 20,986.25 and 5,223.38

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Solution

The fourth proportional to 13,988.39, 20,986.25 and 5,223.38 is: 7,836.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.39 : 20,986.25 = 5,223.38 : x
  2. Step 2: Convert to fraction form
    13,988.39/20,986.25 = 5,223.38/x
  3. Step 3: Cross multiply
    13,988.39x = 20,986.25 × 5,223.38
  4. Step 4: Simplify right side
    13,988.39x = 109,619,027.48
  5. Step 5: Solve for x
    x = 109,619,027.48/13,988.39
  6. Step 6: Final answer
    x = 7,836.43

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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.