Home / 20,927.80-28,878.65-11,975.88

Finding the Fourth Proportional to 20,927.80, 28,878.65 and 11,975.88

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Solution

The fourth proportional to 20,927.80, 28,878.65 and 11,975.88 is: 16,525.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.80 : 28,878.65 = 11,975.88 : x
  2. Step 2: Convert to fraction form
    20,927.80/28,878.65 = 11,975.88/x
  3. Step 3: Cross multiply
    20,927.80x = 28,878.65 × 11,975.88
  4. Step 4: Simplify right side
    20,927.80x = 345,847,130.31
  5. Step 5: Solve for x
    x = 345,847,130.31/20,927.80
  6. Step 6: Final answer
    x = 16,525.73

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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.