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Finding the Fourth Proportional to 21,907.32, 30,232.08 and 11,971.32

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Solution

The fourth proportional to 21,907.32, 30,232.08 and 11,971.32 is: 16,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.32 : 30,232.08 = 11,971.32 : x
  2. Step 2: Convert to fraction form
    21,907.32/30,232.08 = 11,971.32/x
  3. Step 3: Cross multiply
    21,907.32x = 30,232.08 × 11,971.32
  4. Step 4: Simplify right side
    21,907.32x = 361,917,903.95
  5. Step 5: Solve for x
    x = 361,917,903.95/21,907.32
  6. Step 6: Final answer
    x = 16,520.41

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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.