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Finding the Fourth Proportional to 21,989.81, 32,977.87 and 7,195.43

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Solution

The fourth proportional to 21,989.81, 32,977.87 and 7,195.43 is: 10,790.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.81 : 32,977.87 = 7,195.43 : x
  2. Step 2: Convert to fraction form
    21,989.81/32,977.87 = 7,195.43/x
  3. Step 3: Cross multiply
    21,989.81x = 32,977.87 × 7,195.43
  4. Step 4: Simplify right side
    21,989.81x = 237,290,019.59
  5. Step 5: Solve for x
    x = 237,290,019.59/21,989.81
  6. Step 6: Final answer
    x = 10,790.91

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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.