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Finding the Fourth Proportional to 21,940.68, 32,905.58 and 8,616.40

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Solution

The fourth proportional to 21,940.68, 32,905.58 and 8,616.40 is: 12,922.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.68 : 32,905.58 = 8,616.40 : x
  2. Step 2: Convert to fraction form
    21,940.68/32,905.58 = 8,616.40/x
  3. Step 3: Cross multiply
    21,940.68x = 32,905.58 × 8,616.40
  4. Step 4: Simplify right side
    21,940.68x = 283,527,639.51
  5. Step 5: Solve for x
    x = 283,527,639.51/21,940.68
  6. Step 6: Final answer
    x = 12,922.46

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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.