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Finding the Fourth Proportional to 21,858.57, 32,787.63 and 7,067.16

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Solution

The fourth proportional to 21,858.57, 32,787.63 and 7,067.16 is: 10,600.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.57 : 32,787.63 = 7,067.16 : x
  2. Step 2: Convert to fraction form
    21,858.57/32,787.63 = 7,067.16/x
  3. Step 3: Cross multiply
    21,858.57x = 32,787.63 × 7,067.16
  4. Step 4: Simplify right side
    21,858.57x = 231,715,427.23
  5. Step 5: Solve for x
    x = 231,715,427.23/21,858.57
  6. Step 6: Final answer
    x = 10,600.67

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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.