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Finding the Fourth Proportional to 6,308.40, 8,711.10 and 3,954.60

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Solution

The fourth proportional to 6,308.40, 8,711.10 and 3,954.60 is: 5,460.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,308.40 : 8,711.10 = 3,954.60 : x
  2. Step 2: Convert to fraction form
    6,308.40/8,711.10 = 3,954.60/x
  3. Step 3: Cross multiply
    6,308.40x = 8,711.10 × 3,954.60
  4. Step 4: Simplify right side
    6,308.40x = 34,448,916.06
  5. Step 5: Solve for x
    x = 34,448,916.06/6,308.40
  6. Step 6: Final answer
    x = 5,460.80

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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.