Home / 20,917.56-28,865.22-11,357.22

Finding the Fourth Proportional to 20,917.56, 28,865.22 and 11,357.22

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Solution

The fourth proportional to 20,917.56, 28,865.22 and 11,357.22 is: 15,672.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.56 : 28,865.22 = 11,357.22 : x
  2. Step 2: Convert to fraction form
    20,917.56/28,865.22 = 11,357.22/x
  3. Step 3: Cross multiply
    20,917.56x = 28,865.22 × 11,357.22
  4. Step 4: Simplify right side
    20,917.56x = 327,828,653.89
  5. Step 5: Solve for x
    x = 327,828,653.89/20,917.56
  6. Step 6: Final answer
    x = 15,672.41

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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.