Home / 15,839.40-21,858.03-8,669.28

Finding the Fourth Proportional to 15,839.40, 21,858.03 and 8,669.28

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Solution

The fourth proportional to 15,839.40, 21,858.03 and 8,669.28 is: 11,963.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,839.40 : 21,858.03 = 8,669.28 : x
  2. Step 2: Convert to fraction form
    15,839.40/21,858.03 = 8,669.28/x
  3. Step 3: Cross multiply
    15,839.40x = 21,858.03 × 8,669.28
  4. Step 4: Simplify right side
    15,839.40x = 189,493,382.32
  5. Step 5: Solve for x
    x = 189,493,382.32/15,839.40
  6. Step 6: Final answer
    x = 11,963.42

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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.