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Finding the Fourth Proportional to 13,279.84, 18,324.48 and 7,975.60

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Solution

The fourth proportional to 13,279.84, 18,324.48 and 7,975.60 is: 11,005.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.84 : 18,324.48 = 7,975.60 : x
  2. Step 2: Convert to fraction form
    13,279.84/18,324.48 = 7,975.60/x
  3. Step 3: Cross multiply
    13,279.84x = 18,324.48 × 7,975.60
  4. Step 4: Simplify right side
    13,279.84x = 146,148,722.69
  5. Step 5: Solve for x
    x = 146,148,722.69/13,279.84
  6. Step 6: Final answer
    x = 11,005.31

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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.