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Finding the Fourth Proportional to 30,009.43, 45,009.01 and 12,474.55

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Solution

The fourth proportional to 30,009.43, 45,009.01 and 12,474.55 is: 18,709.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,009.43 : 45,009.01 = 12,474.55 : x
  2. Step 2: Convert to fraction form
    30,009.43/45,009.01 = 12,474.55/x
  3. Step 3: Cross multiply
    30,009.43x = 45,009.01 × 12,474.55
  4. Step 4: Simplify right side
    30,009.43x = 561,467,145.70
  5. Step 5: Solve for x
    x = 561,467,145.70/30,009.43
  6. Step 6: Final answer
    x = 18,709.69

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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.