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Finding the Fourth Proportional to 18,412.48, 25,404.80 and 10,858.20

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Solution

The fourth proportional to 18,412.48, 25,404.80 and 10,858.20 is: 14,981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.48 : 25,404.80 = 10,858.20 : x
  2. Step 2: Convert to fraction form
    18,412.48/25,404.80 = 10,858.20/x
  3. Step 3: Cross multiply
    18,412.48x = 25,404.80 × 10,858.20
  4. Step 4: Simplify right side
    18,412.48x = 275,850,399.36
  5. Step 5: Solve for x
    x = 275,850,399.36/18,412.48
  6. Step 6: Final answer
    x = 14,981.71

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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.