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Finding the Fourth Proportional to 30,604.40, 45,903.90 and 8,415.80

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Solution

The fourth proportional to 30,604.40, 45,903.90 and 8,415.80 is: 12,622.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,604.40 : 45,903.90 = 8,415.80 : x
  2. Step 2: Convert to fraction form
    30,604.40/45,903.90 = 8,415.80/x
  3. Step 3: Cross multiply
    30,604.40x = 45,903.90 × 8,415.80
  4. Step 4: Simplify right side
    30,604.40x = 386,318,041.62
  5. Step 5: Solve for x
    x = 386,318,041.62/30,604.40
  6. Step 6: Final answer
    x = 12,622.96

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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.