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Finding the Fourth Proportional to 30,511.68, 45,772.20 and 12,976.80

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Solution

The fourth proportional to 30,511.68, 45,772.20 and 12,976.80 is: 19,467.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,511.68 : 45,772.20 = 12,976.80 : x
  2. Step 2: Convert to fraction form
    30,511.68/45,772.20 = 12,976.80/x
  3. Step 3: Cross multiply
    30,511.68x = 45,772.20 × 12,976.80
  4. Step 4: Simplify right side
    30,511.68x = 593,976,684.96
  5. Step 5: Solve for x
    x = 593,976,684.96/30,511.68
  6. Step 6: Final answer
    x = 19,467.19

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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.