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Finding the Fourth Proportional to 18,889.54, 28,338.41 and 6,239.84

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Solution

The fourth proportional to 18,889.54, 28,338.41 and 6,239.84 is: 9,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.54 : 28,338.41 = 6,239.84 : x
  2. Step 2: Convert to fraction form
    18,889.54/28,338.41 = 6,239.84/x
  3. Step 3: Cross multiply
    18,889.54x = 28,338.41 × 6,239.84
  4. Step 4: Simplify right side
    18,889.54x = 176,827,018.16
  5. Step 5: Solve for x
    x = 176,827,018.16/18,889.54
  6. Step 6: Final answer
    x = 9,361.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.