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Finding the Fourth Proportional to 28,551.15, 39,400.16 and 15,975.90

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Solution

The fourth proportional to 28,551.15, 39,400.16 and 15,975.90 is: 22,046.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,551.15 : 39,400.16 = 15,975.90 : x
  2. Step 2: Convert to fraction form
    28,551.15/39,400.16 = 15,975.90/x
  3. Step 3: Cross multiply
    28,551.15x = 39,400.16 × 15,975.90
  4. Step 4: Simplify right side
    28,551.15x = 629,452,936.26
  5. Step 5: Solve for x
    x = 629,452,936.26/28,551.15
  6. Step 6: Final answer
    x = 22,046.50

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1.5x scale

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.