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Finding the Fourth Proportional to 6,289.48, 8,690.43 and 5,169.57

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Solution

The fourth proportional to 6,289.48, 8,690.43 and 5,169.57 is: 7,143.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289.48 : 8,690.43 = 5,169.57 : x
  2. Step 2: Convert to fraction form
    6,289.48/8,690.43 = 5,169.57/x
  3. Step 3: Cross multiply
    6,289.48x = 8,690.43 × 5,169.57
  4. Step 4: Simplify right side
    6,289.48x = 44,925,786.22
  5. Step 5: Solve for x
    x = 44,925,786.22/6,289.48
  6. Step 6: Final answer
    x = 7,143.00

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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.