Home / 13,979.52-19,291.70-8,390.52

Finding the Fourth Proportional to 13,979.52, 19,291.70 and 8,390.52

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Solution

The fourth proportional to 13,979.52, 19,291.70 and 8,390.52 is: 11,578.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.52 : 19,291.70 = 8,390.52 : x
  2. Step 2: Convert to fraction form
    13,979.52/19,291.70 = 8,390.52/x
  3. Step 3: Cross multiply
    13,979.52x = 19,291.70 × 8,390.52
  4. Step 4: Simplify right side
    13,979.52x = 161,867,394.68
  5. Step 5: Solve for x
    x = 161,867,394.68/13,979.52
  6. Step 6: Final answer
    x = 11,578.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.