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Finding the Fourth Proportional to 30,620.88, 45,927.60 and 8,436.48

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Solution

The fourth proportional to 30,620.88, 45,927.60 and 8,436.48 is: 12,653.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.88 : 45,927.60 = 8,436.48 : x
  2. Step 2: Convert to fraction form
    30,620.88/45,927.60 = 8,436.48/x
  3. Step 3: Cross multiply
    30,620.88x = 45,927.60 × 8,436.48
  4. Step 4: Simplify right side
    30,620.88x = 387,467,278.85
  5. Step 5: Solve for x
    x = 387,467,278.85/30,620.88
  6. Step 6: Final answer
    x = 12,653.70

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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.