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Finding the Fourth Proportional to 30,103.88, 45,158.80 and 10,379.84

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Solution

The fourth proportional to 30,103.88, 45,158.80 and 10,379.84 is: 15,570.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,103.88 : 45,158.80 = 10,379.84 : x
  2. Step 2: Convert to fraction form
    30,103.88/45,158.80 = 10,379.84/x
  3. Step 3: Cross multiply
    30,103.88x = 45,158.80 × 10,379.84
  4. Step 4: Simplify right side
    30,103.88x = 468,741,118.59
  5. Step 5: Solve for x
    x = 468,741,118.59/30,103.88
  6. Step 6: Final answer
    x = 15,570.79

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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.