Home / 21,764.45-30,032.64-12,811.41

Finding the Fourth Proportional to 21,764.45, 30,032.64 and 12,811.41

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Solution

The fourth proportional to 21,764.45, 30,032.64 and 12,811.41 is: 17,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.45 : 30,032.64 = 12,811.41 : x
  2. Step 2: Convert to fraction form
    21,764.45/30,032.64 = 12,811.41/x
  3. Step 3: Cross multiply
    21,764.45x = 30,032.64 × 12,811.41
  4. Step 4: Simplify right side
    21,764.45x = 384,760,464.42
  5. Step 5: Solve for x
    x = 384,760,464.42/21,764.45
  6. Step 6: Final answer
    x = 17,678.40

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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.