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Finding the Fourth Proportional to 7,487.89, 11,235.78 and 5,731.81

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Solution

The fourth proportional to 7,487.89, 11,235.78 and 5,731.81 is: 8,600.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.89 : 11,235.78 = 5,731.81 : x
  2. Step 2: Convert to fraction form
    7,487.89/11,235.78 = 5,731.81/x
  3. Step 3: Cross multiply
    7,487.89x = 11,235.78 × 5,731.81
  4. Step 4: Simplify right side
    7,487.89x = 64,401,328.07
  5. Step 5: Solve for x
    x = 64,401,328.07/7,487.89
  6. Step 6: Final answer
    x = 8,600.73

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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.