Home / 20,648.81-30,972.71-5,857.75

Finding the Fourth Proportional to 20,648.81, 30,972.71 and 5,857.75

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Solution

The fourth proportional to 20,648.81, 30,972.71 and 5,857.75 is: 8,786.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.81 : 30,972.71 = 5,857.75 : x
  2. Step 2: Convert to fraction form
    20,648.81/30,972.71 = 5,857.75/x
  3. Step 3: Cross multiply
    20,648.81x = 30,972.71 × 5,857.75
  4. Step 4: Simplify right side
    20,648.81x = 181,430,307.25
  5. Step 5: Solve for x
    x = 181,430,307.25/20,648.81
  6. Step 6: Final answer
    x = 8,786.48

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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.