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Finding the Fourth Proportional to 15,907.97, 21,953.26 and 8,738.55

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Solution

The fourth proportional to 15,907.97, 21,953.26 and 8,738.55 is: 12,059.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.97 : 21,953.26 = 8,738.55 : x
  2. Step 2: Convert to fraction form
    15,907.97/21,953.26 = 8,738.55/x
  3. Step 3: Cross multiply
    15,907.97x = 21,953.26 × 8,738.55
  4. Step 4: Simplify right side
    15,907.97x = 191,839,660.17
  5. Step 5: Solve for x
    x = 191,839,660.17/15,907.97
  6. Step 6: Final answer
    x = 12,059.34

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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.