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Finding the Fourth Proportional to 5,813.92, 8,720.70 and 3,865.60

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Solution

The fourth proportional to 5,813.92, 8,720.70 and 3,865.60 is: 5,798.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,813.92 : 8,720.70 = 3,865.60 : x
  2. Step 2: Convert to fraction form
    5,813.92/8,720.70 = 3,865.60/x
  3. Step 3: Cross multiply
    5,813.92x = 8,720.70 × 3,865.60
  4. Step 4: Simplify right side
    5,813.92x = 33,710,737.92
  5. Step 5: Solve for x
    x = 33,710,737.92/5,813.92
  6. Step 6: Final answer
    x = 5,798.28

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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.