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Finding the Fourth Proportional to 30,415.69, 45,625.16 and 9,640.81

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Solution

The fourth proportional to 30,415.69, 45,625.16 and 9,640.81 is: 14,461.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.69 : 45,625.16 = 9,640.81 : x
  2. Step 2: Convert to fraction form
    30,415.69/45,625.16 = 9,640.81/x
  3. Step 3: Cross multiply
    30,415.69x = 45,625.16 × 9,640.81
  4. Step 4: Simplify right side
    30,415.69x = 439,863,450.58
  5. Step 5: Solve for x
    x = 439,863,450.58/30,415.69
  6. Step 6: Final answer
    x = 14,461.73

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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.