Home / 20,995.12-28,973.64-11,563.66

Finding the Fourth Proportional to 20,995.12, 28,973.64 and 11,563.66

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Solution

The fourth proportional to 20,995.12, 28,973.64 and 11,563.66 is: 15,958.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.12 : 28,973.64 = 11,563.66 : x
  2. Step 2: Convert to fraction form
    20,995.12/28,973.64 = 11,563.66/x
  3. Step 3: Cross multiply
    20,995.12x = 28,973.64 × 11,563.66
  4. Step 4: Simplify right side
    20,995.12x = 335,041,321.92
  5. Step 5: Solve for x
    x = 335,041,321.92/20,995.12
  6. Step 6: Final answer
    x = 15,958.06

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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.