Home / 20,995.22-28,973.35-11,563.78

Finding the Fourth Proportional to 20,995.22, 28,973.35 and 11,563.78

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Solution

The fourth proportional to 20,995.22, 28,973.35 and 11,563.78 is: 15,957.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.22 : 28,973.35 = 11,563.78 : x
  2. Step 2: Convert to fraction form
    20,995.22/28,973.35 = 11,563.78/x
  3. Step 3: Cross multiply
    20,995.22x = 28,973.35 × 11,563.78
  4. Step 4: Simplify right side
    20,995.22x = 335,041,445.26
  5. Step 5: Solve for x
    x = 335,041,445.26/20,995.22
  6. Step 6: Final answer
    x = 15,957.99

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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.