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Finding the Fourth Proportional to 30,315.84, 45,474.97 and 15,520.78

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Solution

The fourth proportional to 30,315.84, 45,474.97 and 15,520.78 is: 23,281.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,315.84 : 45,474.97 = 15,520.78 : x
  2. Step 2: Convert to fraction form
    30,315.84/45,474.97 = 15,520.78/x
  3. Step 3: Cross multiply
    30,315.84x = 45,474.97 × 15,520.78
  4. Step 4: Simplify right side
    30,315.84x = 705,807,004.88
  5. Step 5: Solve for x
    x = 705,807,004.88/30,315.84
  6. Step 6: Final answer
    x = 23,281.79

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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.