Home / 21,989.44-30,316.02-18,198.64

Finding the Fourth Proportional to 21,989.44, 30,316.02 and 18,198.64

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Solution

The fourth proportional to 21,989.44, 30,316.02 and 18,198.64 is: 25,089.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.44 : 30,316.02 = 18,198.64 : x
  2. Step 2: Convert to fraction form
    21,989.44/30,316.02 = 18,198.64/x
  3. Step 3: Cross multiply
    21,989.44x = 30,316.02 × 18,198.64
  4. Step 4: Simplify right side
    21,989.44x = 551,710,334.21
  5. Step 5: Solve for x
    x = 551,710,334.21/21,989.44
  6. Step 6: Final answer
    x = 25,089.79

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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.