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Finding the Fourth Proportional to 5,763.81, 7,986.18 and 5,639.25

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Solution

The fourth proportional to 5,763.81, 7,986.18 and 5,639.25 is: 7,813.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,763.81 : 7,986.18 = 5,639.25 : x
  2. Step 2: Convert to fraction form
    5,763.81/7,986.18 = 5,639.25/x
  3. Step 3: Cross multiply
    5,763.81x = 7,986.18 × 5,639.25
  4. Step 4: Simplify right side
    5,763.81x = 45,036,065.57
  5. Step 5: Solve for x
    x = 45,036,065.57/5,763.81
  6. Step 6: Final answer
    x = 7,813.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.