Home / 20,571.07-30,851.79-5,781.40

Finding the Fourth Proportional to 20,571.07, 30,851.79 and 5,781.40

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Solution

The fourth proportional to 20,571.07, 30,851.79 and 5,781.40 is: 8,670.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.07 : 30,851.79 = 5,781.40 : x
  2. Step 2: Convert to fraction form
    20,571.07/30,851.79 = 5,781.40/x
  3. Step 3: Cross multiply
    20,571.07x = 30,851.79 × 5,781.40
  4. Step 4: Simplify right side
    20,571.07x = 178,366,538.71
  5. Step 5: Solve for x
    x = 178,366,538.71/20,571.07
  6. Step 6: Final answer
    x = 8,670.75

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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.