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Finding the Fourth Proportional to 13,291.44, 19,918.44 and 10,356.72

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Solution

The fourth proportional to 13,291.44, 19,918.44 and 10,356.72 is: 15,520.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.44 : 19,918.44 = 10,356.72 : x
  2. Step 2: Convert to fraction form
    13,291.44/19,918.44 = 10,356.72/x
  3. Step 3: Cross multiply
    13,291.44x = 19,918.44 × 10,356.72
  4. Step 4: Simplify right side
    13,291.44x = 206,289,705.92
  5. Step 5: Solve for x
    x = 206,289,705.92/13,291.44
  6. Step 6: Final answer
    x = 15,520.49

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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.