Home / 20,995.53-28,968.86-11,918.88

Finding the Fourth Proportional to 20,995.53, 28,968.86 and 11,918.88

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Solution

The fourth proportional to 20,995.53, 28,968.86 and 11,918.88 is: 16,445.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.53 : 28,968.86 = 11,918.88 : x
  2. Step 2: Convert to fraction form
    20,995.53/28,968.86 = 11,918.88/x
  3. Step 3: Cross multiply
    20,995.53x = 28,968.86 × 11,918.88
  4. Step 4: Simplify right side
    20,995.53x = 345,276,366.08
  5. Step 5: Solve for x
    x = 345,276,366.08/20,995.53
  6. Step 6: Final answer
    x = 16,445.23

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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.