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Finding the Fourth Proportional to 16,213.80, 21,957.75 and 16,213.80

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Solution

The fourth proportional to 16,213.80, 21,957.75 and 16,213.80 is: 21,957.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,213.80 : 21,957.75 = 16,213.80 : x
  2. Step 2: Convert to fraction form
    16,213.80/21,957.75 = 16,213.80/x
  3. Step 3: Cross multiply
    16,213.80x = 21,957.75 × 16,213.80
  4. Step 4: Simplify right side
    16,213.80x = 356,018,566.95
  5. Step 5: Solve for x
    x = 356,018,566.95/16,213.80
  6. Step 6: Final answer
    x = 21,957.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.