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Finding the Fourth Proportional to 6,668.78, 10,004.20 and 4,038.20

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Solution

The fourth proportional to 6,668.78, 10,004.20 and 4,038.20 is: 6,057.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,668.78 : 10,004.20 = 4,038.20 : x
  2. Step 2: Convert to fraction form
    6,668.78/10,004.20 = 4,038.20/x
  3. Step 3: Cross multiply
    6,668.78x = 10,004.20 × 4,038.20
  4. Step 4: Simplify right side
    6,668.78x = 40,398,960.44
  5. Step 5: Solve for x
    x = 40,398,960.44/6,668.78
  6. Step 6: Final answer
    x = 6,057.92

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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.