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Finding the Fourth Proportional to 30,872.88, 46,303.89 and 8,680.98

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Solution

The fourth proportional to 30,872.88, 46,303.89 and 8,680.98 is: 13,019.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,872.88 : 46,303.89 = 8,680.98 : x
  2. Step 2: Convert to fraction form
    30,872.88/46,303.89 = 8,680.98/x
  3. Step 3: Cross multiply
    30,872.88x = 46,303.89 × 8,680.98
  4. Step 4: Simplify right side
    30,872.88x = 401,963,143.01
  5. Step 5: Solve for x
    x = 401,963,143.01/30,872.88
  6. Step 6: Final answer
    x = 13,019.94

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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.