Home / 13,750.75-18,927.84-11,979.28

Finding the Fourth Proportional to 13,750.75, 18,927.84 and 11,979.28

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Solution

The fourth proportional to 13,750.75, 18,927.84 and 11,979.28 is: 16,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.75 : 18,927.84 = 11,979.28 : x
  2. Step 2: Convert to fraction form
    13,750.75/18,927.84 = 11,979.28/x
  3. Step 3: Cross multiply
    13,750.75x = 18,927.84 × 11,979.28
  4. Step 4: Simplify right side
    13,750.75x = 226,741,895.16
  5. Step 5: Solve for x
    x = 226,741,895.16/13,750.75
  6. Step 6: Final answer
    x = 16,489.42

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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.