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Finding the Fourth Proportional to 21,803.58, 30,080.16 and 12,844.98

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Solution

The fourth proportional to 21,803.58, 30,080.16 and 12,844.98 is: 17,720.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.58 : 30,080.16 = 12,844.98 : x
  2. Step 2: Convert to fraction form
    21,803.58/30,080.16 = 12,844.98/x
  3. Step 3: Cross multiply
    21,803.58x = 30,080.16 × 12,844.98
  4. Step 4: Simplify right side
    21,803.58x = 386,379,053.60
  5. Step 5: Solve for x
    x = 386,379,053.60/21,803.58
  6. Step 6: Final answer
    x = 17,720.90

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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.