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Finding the Fourth Proportional to 15,907.12, 21,950.70 and 9,939.88

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Solution

The fourth proportional to 15,907.12, 21,950.70 and 9,939.88 is: 13,716.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.12 : 21,950.70 = 9,939.88 : x
  2. Step 2: Convert to fraction form
    15,907.12/21,950.70 = 9,939.88/x
  3. Step 3: Cross multiply
    15,907.12x = 21,950.70 × 9,939.88
  4. Step 4: Simplify right side
    15,907.12x = 218,187,323.92
  5. Step 5: Solve for x
    x = 218,187,323.92/15,907.12
  6. Step 6: Final answer
    x = 13,716.33

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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.