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Finding the Fourth Proportional to 49,390.80, 74,086.20 and 12,454.80

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Solution

The fourth proportional to 49,390.80, 74,086.20 and 12,454.80 is: 18,682.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,390.80 : 74,086.20 = 12,454.80 : x
  2. Step 2: Convert to fraction form
    49,390.80/74,086.20 = 12,454.80/x
  3. Step 3: Cross multiply
    49,390.80x = 74,086.20 × 12,454.80
  4. Step 4: Simplify right side
    49,390.80x = 922,728,803.76
  5. Step 5: Solve for x
    x = 922,728,803.76/49,390.80
  6. Step 6: Final answer
    x = 18,682.20

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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.