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Finding the Fourth Proportional to 7,903.62, 11,857.20 and 2,638.89

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Solution

The fourth proportional to 7,903.62, 11,857.20 and 2,638.89 is: 3,958.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.62 : 11,857.20 = 2,638.89 : x
  2. Step 2: Convert to fraction form
    7,903.62/11,857.20 = 2,638.89/x
  3. Step 3: Cross multiply
    7,903.62x = 11,857.20 × 2,638.89
  4. Step 4: Simplify right side
    7,903.62x = 31,289,846.51
  5. Step 5: Solve for x
    x = 31,289,846.51/7,903.62
  6. Step 6: Final answer
    x = 3,958.93

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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.