Home / 20,704.10-28,570.80-11,272.64

Finding the Fourth Proportional to 20,704.10, 28,570.80 and 11,272.64

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Solution

The fourth proportional to 20,704.10, 28,570.80 and 11,272.64 is: 15,555.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.10 : 28,570.80 = 11,272.64 : x
  2. Step 2: Convert to fraction form
    20,704.10/28,570.80 = 11,272.64/x
  3. Step 3: Cross multiply
    20,704.10x = 28,570.80 × 11,272.64
  4. Step 4: Simplify right side
    20,704.10x = 322,068,342.91
  5. Step 5: Solve for x
    x = 322,068,342.91/20,704.10
  6. Step 6: Final answer
    x = 15,555.78

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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.