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Finding the Fourth Proportional to 21,790.94, 32,657.68 and 8,636.12

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Solution

The fourth proportional to 21,790.94, 32,657.68 and 8,636.12 is: 12,942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.94 : 32,657.68 = 8,636.12 : x
  2. Step 2: Convert to fraction form
    21,790.94/32,657.68 = 8,636.12/x
  3. Step 3: Cross multiply
    21,790.94x = 32,657.68 × 8,636.12
  4. Step 4: Simplify right side
    21,790.94x = 282,035,643.40
  5. Step 5: Solve for x
    x = 282,035,643.40/21,790.94
  6. Step 6: Final answer
    x = 12,942.79

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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.