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Finding the Fourth Proportional to 5,684.28, 7,841.28 and 3,916.80

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Solution

The fourth proportional to 5,684.28, 7,841.28 and 3,916.80 is: 5,403.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,684.28 : 7,841.28 = 3,916.80 : x
  2. Step 2: Convert to fraction form
    5,684.28/7,841.28 = 3,916.80/x
  3. Step 3: Cross multiply
    5,684.28x = 7,841.28 × 3,916.80
  4. Step 4: Simplify right side
    5,684.28x = 30,712,725.50
  5. Step 5: Solve for x
    x = 30,712,725.50/5,684.28
  6. Step 6: Final answer
    x = 5,403.10

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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.