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Finding the Fourth Proportional to 7,776.62, 10,731.78 and 4,240.05

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Solution

The fourth proportional to 7,776.62, 10,731.78 and 4,240.05 is: 5,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,776.62 : 10,731.78 = 4,240.05 : x
  2. Step 2: Convert to fraction form
    7,776.62/10,731.78 = 4,240.05/x
  3. Step 3: Cross multiply
    7,776.62x = 10,731.78 × 4,240.05
  4. Step 4: Simplify right side
    7,776.62x = 45,503,283.79
  5. Step 5: Solve for x
    x = 45,503,283.79/7,776.62
  6. Step 6: Final answer
    x = 5,851.30

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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.