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Finding the Fourth Proportional to 18,378.69, 25,333.20 and 14,491.68

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Solution

The fourth proportional to 18,378.69, 25,333.20 and 14,491.68 is: 19,975.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.69 : 25,333.20 = 14,491.68 : x
  2. Step 2: Convert to fraction form
    18,378.69/25,333.20 = 14,491.68/x
  3. Step 3: Cross multiply
    18,378.69x = 25,333.20 × 14,491.68
  4. Step 4: Simplify right side
    18,378.69x = 367,120,627.78
  5. Step 5: Solve for x
    x = 367,120,627.78/18,378.69
  6. Step 6: Final answer
    x = 19,975.34

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Double scale
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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.