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Finding the Fourth Proportional to 30,120.94, 45,209.46 and 15,340.98

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Solution

The fourth proportional to 30,120.94, 45,209.46 and 15,340.98 is: 23,025.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.94 : 45,209.46 = 15,340.98 : x
  2. Step 2: Convert to fraction form
    30,120.94/45,209.46 = 15,340.98/x
  3. Step 3: Cross multiply
    30,120.94x = 45,209.46 × 15,340.98
  4. Step 4: Simplify right side
    30,120.94x = 693,557,195.62
  5. Step 5: Solve for x
    x = 693,557,195.62/30,120.94
  6. Step 6: Final answer
    x = 23,025.75

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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.