Home / 20,917.05-31,368.08-7,586.69

Finding the Fourth Proportional to 20,917.05, 31,368.08 and 7,586.69

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Solution

The fourth proportional to 20,917.05, 31,368.08 and 7,586.69 is: 11,377.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.05 : 31,368.08 = 7,586.69 : x
  2. Step 2: Convert to fraction form
    20,917.05/31,368.08 = 7,586.69/x
  3. Step 3: Cross multiply
    20,917.05x = 31,368.08 × 7,586.69
  4. Step 4: Simplify right side
    20,917.05x = 237,979,704.08
  5. Step 5: Solve for x
    x = 237,979,704.08/20,917.05
  6. Step 6: Final answer
    x = 11,377.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.