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Finding the Fourth Proportional to 5,813.60, 8,720.40 and 5,727.20

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Solution

The fourth proportional to 5,813.60, 8,720.40 and 5,727.20 is: 8,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,813.60 : 8,720.40 = 5,727.20 : x
  2. Step 2: Convert to fraction form
    5,813.60/8,720.40 = 5,727.20/x
  3. Step 3: Cross multiply
    5,813.60x = 8,720.40 × 5,727.20
  4. Step 4: Simplify right side
    5,813.60x = 49,943,474.88
  5. Step 5: Solve for x
    x = 49,943,474.88/5,813.60
  6. Step 6: Final answer
    x = 8,590.80

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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.