Home / 28,967.75-39,975.50-15,719.75

Finding the Fourth Proportional to 28,967.75, 39,975.50 and 15,719.75

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Solution

The fourth proportional to 28,967.75, 39,975.50 and 15,719.75 is: 21,693.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,967.75 : 39,975.50 = 15,719.75 : x
  2. Step 2: Convert to fraction form
    28,967.75/39,975.50 = 15,719.75/x
  3. Step 3: Cross multiply
    28,967.75x = 39,975.50 × 15,719.75
  4. Step 4: Simplify right side
    28,967.75x = 628,404,866.13
  5. Step 5: Solve for x
    x = 628,404,866.13/28,967.75
  6. Step 6: Final answer
    x = 21,693.26

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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.