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Finding the Fourth Proportional to 28,847.75, 39,809.90 and 15,599.75

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Solution

The fourth proportional to 28,847.75, 39,809.90 and 15,599.75 is: 21,527.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,847.75 : 39,809.90 = 15,599.75 : x
  2. Step 2: Convert to fraction form
    28,847.75/39,809.90 = 15,599.75/x
  3. Step 3: Cross multiply
    28,847.75x = 39,809.90 × 15,599.75
  4. Step 4: Simplify right side
    28,847.75x = 621,024,487.53
  5. Step 5: Solve for x
    x = 621,024,487.53/28,847.75
  6. Step 6: Final answer
    x = 21,527.66

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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.