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Finding the Fourth Proportional to 18,812.82, 25,962.21 and 11,356.50

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Solution

The fourth proportional to 18,812.82, 25,962.21 and 11,356.50 is: 15,672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.82 : 25,962.21 = 11,356.50 : x
  2. Step 2: Convert to fraction form
    18,812.82/25,962.21 = 11,356.50/x
  3. Step 3: Cross multiply
    18,812.82x = 25,962.21 × 11,356.50
  4. Step 4: Simplify right side
    18,812.82x = 294,839,837.87
  5. Step 5: Solve for x
    x = 294,839,837.87/18,812.82
  6. Step 6: Final answer
    x = 15,672.28

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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.