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Finding the Fourth Proportional to 9,377.78, 12,940.81 and 5,127.99

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Solution

The fourth proportional to 9,377.78, 12,940.81 and 5,127.99 is: 7,076.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,377.78 : 12,940.81 = 5,127.99 : x
  2. Step 2: Convert to fraction form
    9,377.78/12,940.81 = 5,127.99/x
  3. Step 3: Cross multiply
    9,377.78x = 12,940.81 × 5,127.99
  4. Step 4: Simplify right side
    9,377.78x = 66,360,331.45
  5. Step 5: Solve for x
    x = 66,360,331.45/9,377.78
  6. Step 6: Final answer
    x = 7,076.34

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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.