Home / 13,171.39-19,758.90-5,378.38

Finding the Fourth Proportional to 13,171.39, 19,758.90 and 5,378.38

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Solution

The fourth proportional to 13,171.39, 19,758.90 and 5,378.38 is: 8,068.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.39 : 19,758.90 = 5,378.38 : x
  2. Step 2: Convert to fraction form
    13,171.39/19,758.90 = 5,378.38/x
  3. Step 3: Cross multiply
    13,171.39x = 19,758.90 × 5,378.38
  4. Step 4: Simplify right side
    13,171.39x = 106,270,872.58
  5. Step 5: Solve for x
    x = 106,270,872.58/13,171.39
  6. Step 6: Final answer
    x = 8,068.31

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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.