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Finding the Fourth Proportional to 8,403.58, 12,606.60 and 3,138.16

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Solution

The fourth proportional to 8,403.58, 12,606.60 and 3,138.16 is: 4,707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,403.58 : 12,606.60 = 3,138.16 : x
  2. Step 2: Convert to fraction form
    8,403.58/12,606.60 = 3,138.16/x
  3. Step 3: Cross multiply
    8,403.58x = 12,606.60 × 3,138.16
  4. Step 4: Simplify right side
    8,403.58x = 39,561,527.86
  5. Step 5: Solve for x
    x = 39,561,527.86/8,403.58
  6. Step 6: Final answer
    x = 4,707.70

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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.