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Finding the Fourth Proportional to 30,990.61, 46,476.60 and 8,805.79

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Solution

The fourth proportional to 30,990.61, 46,476.60 and 8,805.79 is: 13,206.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.61 : 46,476.60 = 8,805.79 : x
  2. Step 2: Convert to fraction form
    30,990.61/46,476.60 = 8,805.79/x
  3. Step 3: Cross multiply
    30,990.61x = 46,476.60 × 8,805.79
  4. Step 4: Simplify right side
    30,990.61x = 409,263,179.51
  5. Step 5: Solve for x
    x = 409,263,179.51/30,990.61
  6. Step 6: Final answer
    x = 13,206.04

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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.