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Finding the Fourth Proportional to 30,640.85, 45,955.80 and 8,151.65

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Solution

The fourth proportional to 30,640.85, 45,955.80 and 8,151.65 is: 12,226.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.85 : 45,955.80 = 8,151.65 : x
  2. Step 2: Convert to fraction form
    30,640.85/45,955.80 = 8,151.65/x
  3. Step 3: Cross multiply
    30,640.85x = 45,955.80 × 8,151.65
  4. Step 4: Simplify right side
    30,640.85x = 374,615,597.07
  5. Step 5: Solve for x
    x = 374,615,597.07/30,640.85
  6. Step 6: Final answer
    x = 12,226.02

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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.