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Finding the Fourth Proportional to 28,710, 39,619.08 and 15,963.21

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Solution

The fourth proportional to 28,710, 39,619.08 and 15,963.21 is: 22,028.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,710 : 39,619.08 = 15,963.21 : x
  2. Step 2: Convert to fraction form
    28,710/39,619.08 = 15,963.21/x
  3. Step 3: Cross multiply
    28,710x = 39,619.08 × 15,963.21
  4. Step 4: Simplify right side
    28,710x = 632,447,694.05
  5. Step 5: Solve for x
    x = 632,447,694.05/28,710
  6. Step 6: Final answer
    x = 22,028.83

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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.