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Finding the Fourth Proportional to 18,358.75, 25,335.28 and 9,975.25

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Solution

The fourth proportional to 18,358.75, 25,335.28 and 9,975.25 is: 13,765.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.75 : 25,335.28 = 9,975.25 : x
  2. Step 2: Convert to fraction form
    18,358.75/25,335.28 = 9,975.25/x
  3. Step 3: Cross multiply
    18,358.75x = 25,335.28 × 9,975.25
  4. Step 4: Simplify right side
    18,358.75x = 252,725,751.82
  5. Step 5: Solve for x
    x = 252,725,751.82/18,358.75
  6. Step 6: Final answer
    x = 13,765.96

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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.