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Finding the Fourth Proportional to 12,409.93, 18,630.69 and 8,045.65

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Solution

The fourth proportional to 12,409.93, 18,630.69 and 8,045.65 is: 12,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,409.93 : 18,630.69 = 8,045.65 : x
  2. Step 2: Convert to fraction form
    12,409.93/18,630.69 = 8,045.65/x
  3. Step 3: Cross multiply
    12,409.93x = 18,630.69 × 8,045.65
  4. Step 4: Simplify right side
    12,409.93x = 149,896,011.00
  5. Step 5: Solve for x
    x = 149,896,011.00/12,409.93
  6. Step 6: Final answer
    x = 12,078.72

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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.