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Finding the Fourth Proportional to 8,757.43, 12,085.03 and 4,778.57

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Solution

The fourth proportional to 8,757.43, 12,085.03 and 4,778.57 is: 6,594.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.43 : 12,085.03 = 4,778.57 : x
  2. Step 2: Convert to fraction form
    8,757.43/12,085.03 = 4,778.57/x
  3. Step 3: Cross multiply
    8,757.43x = 12,085.03 × 4,778.57
  4. Step 4: Simplify right side
    8,757.43x = 57,749,161.81
  5. Step 5: Solve for x
    x = 57,749,161.81/8,757.43
  6. Step 6: Final answer
    x = 6,594.30

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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.