Home / 28,396-39,186.48-15,821.56

Finding the Fourth Proportional to 28,396, 39,186.48 and 15,821.56

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Solution

The fourth proportional to 28,396, 39,186.48 and 15,821.56 is: 21,833.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396 : 39,186.48 = 15,821.56 : x
  2. Step 2: Convert to fraction form
    28,396/39,186.48 = 15,821.56/x
  3. Step 3: Cross multiply
    28,396x = 39,186.48 × 15,821.56
  4. Step 4: Simplify right side
    28,396x = 619,991,244.51
  5. Step 5: Solve for x
    x = 619,991,244.51/28,396
  6. Step 6: Final answer
    x = 21,833.75

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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.