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Finding the Fourth Proportional to 3,916.80, 5,673.60 and 3,916.80

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Solution

The fourth proportional to 3,916.80, 5,673.60 and 3,916.80 is: 5,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.80 : 5,673.60 = 3,916.80 : x
  2. Step 2: Convert to fraction form
    3,916.80/5,673.60 = 3,916.80/x
  3. Step 3: Cross multiply
    3,916.80x = 5,673.60 × 3,916.80
  4. Step 4: Simplify right side
    3,916.80x = 22,222,356.48
  5. Step 5: Solve for x
    x = 22,222,356.48/3,916.80
  6. Step 6: Final answer
    x = 5,673.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.