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Finding the Fourth Proportional to 16,090.71, 22,205.99 and 8,921.38

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Solution

The fourth proportional to 16,090.71, 22,205.99 and 8,921.38 is: 12,311.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,090.71 : 22,205.99 = 8,921.38 : x
  2. Step 2: Convert to fraction form
    16,090.71/22,205.99 = 8,921.38/x
  3. Step 3: Cross multiply
    16,090.71x = 22,205.99 × 8,921.38
  4. Step 4: Simplify right side
    16,090.71x = 198,108,075.07
  5. Step 5: Solve for x
    x = 198,108,075.07/16,090.71
  6. Step 6: Final answer
    x = 12,311.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.