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Finding the Fourth Proportional to 28,449, 39,259.62 and 15,873.84

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Solution

The fourth proportional to 28,449, 39,259.62 and 15,873.84 is: 21,905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,449 : 39,259.62 = 15,873.84 : x
  2. Step 2: Convert to fraction form
    28,449/39,259.62 = 15,873.84/x
  3. Step 3: Cross multiply
    28,449x = 39,259.62 × 15,873.84
  4. Step 4: Simplify right side
    28,449x = 623,200,926.34
  5. Step 5: Solve for x
    x = 623,200,926.34/28,449
  6. Step 6: Final answer
    x = 21,905.90

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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.