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Finding the Fourth Proportional to 28,173, 38,878.74 and 15,597.84

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Solution

The fourth proportional to 28,173, 38,878.74 and 15,597.84 is: 21,525.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173 : 38,878.74 = 15,597.84 : x
  2. Step 2: Convert to fraction form
    28,173/38,878.74 = 15,597.84/x
  3. Step 3: Cross multiply
    28,173x = 38,878.74 × 15,597.84
  4. Step 4: Simplify right side
    28,173x = 606,424,365.92
  5. Step 5: Solve for x
    x = 606,424,365.92/28,173
  6. Step 6: Final answer
    x = 21,525.02

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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.