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Finding the Fourth Proportional to 7,902.39, 11,853.60 and 7,421.25

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Solution

The fourth proportional to 7,902.39, 11,853.60 and 7,421.25 is: 11,131.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,902.39 : 11,853.60 = 7,421.25 : x
  2. Step 2: Convert to fraction form
    7,902.39/11,853.60 = 7,421.25/x
  3. Step 3: Cross multiply
    7,902.39x = 11,853.60 × 7,421.25
  4. Step 4: Simplify right side
    7,902.39x = 87,968,529
  5. Step 5: Solve for x
    x = 87,968,529/7,902.39
  6. Step 6: Final answer
    x = 11,131.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.