Home / 20,899.96-28,840.80-11,467.78

Finding the Fourth Proportional to 20,899.96, 28,840.80 and 11,467.78

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Solution

The fourth proportional to 20,899.96, 28,840.80 and 11,467.78 is: 15,824.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.96 : 28,840.80 = 11,467.78 : x
  2. Step 2: Convert to fraction form
    20,899.96/28,840.80 = 11,467.78/x
  3. Step 3: Cross multiply
    20,899.96x = 28,840.80 × 11,467.78
  4. Step 4: Simplify right side
    20,899.96x = 330,739,949.42
  5. Step 5: Solve for x
    x = 330,739,949.42/20,899.96
  6. Step 6: Final answer
    x = 15,824.91

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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.