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Finding the Fourth Proportional to 18,358.90, 25,334.97 and 9,975.34

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Solution

The fourth proportional to 18,358.90, 25,334.97 and 9,975.34 is: 13,765.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.90 : 25,334.97 = 9,975.34 : x
  2. Step 2: Convert to fraction form
    18,358.90/25,334.97 = 9,975.34/x
  3. Step 3: Cross multiply
    18,358.90x = 25,334.97 × 9,975.34
  4. Step 4: Simplify right side
    18,358.90x = 252,724,939.64
  5. Step 5: Solve for x
    x = 252,724,939.64/18,358.90
  6. Step 6: Final answer
    x = 13,765.80

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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.