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Finding the Fourth Proportional to 5,682.56, 7,839.71 and 4,189.93

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Solution

The fourth proportional to 5,682.56, 7,839.71 and 4,189.93 is: 5,780.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,682.56 : 7,839.71 = 4,189.93 : x
  2. Step 2: Convert to fraction form
    5,682.56/7,839.71 = 4,189.93/x
  3. Step 3: Cross multiply
    5,682.56x = 7,839.71 × 4,189.93
  4. Step 4: Simplify right side
    5,682.56x = 32,847,823.07
  5. Step 5: Solve for x
    x = 32,847,823.07/5,682.56
  6. Step 6: Final answer
    x = 5,780.47

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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.