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Finding the Fourth Proportional to 15,812.28, 21,820.73 and 8,738.55

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Solution

The fourth proportional to 15,812.28, 21,820.73 and 8,738.55 is: 12,059.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.28 : 21,820.73 = 8,738.55 : x
  2. Step 2: Convert to fraction form
    15,812.28/21,820.73 = 8,738.55/x
  3. Step 3: Cross multiply
    15,812.28x = 21,820.73 × 8,738.55
  4. Step 4: Simplify right side
    15,812.28x = 190,681,496.45
  5. Step 5: Solve for x
    x = 190,681,496.45/15,812.28
  6. Step 6: Final answer
    x = 12,059.08

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.