Home / 21,905.08-30,246.72-20,804.29

Finding the Fourth Proportional to 21,905.08, 30,246.72 and 20,804.29

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Solution

The fourth proportional to 21,905.08, 30,246.72 and 20,804.29 is: 28,726.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.08 : 30,246.72 = 20,804.29 : x
  2. Step 2: Convert to fraction form
    21,905.08/30,246.72 = 20,804.29/x
  3. Step 3: Cross multiply
    21,905.08x = 30,246.72 × 20,804.29
  4. Step 4: Simplify right side
    21,905.08x = 629,261,534.43
  5. Step 5: Solve for x
    x = 629,261,534.43/21,905.08
  6. Step 6: Final answer
    x = 28,726.74

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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.