Home / 28,663.85-39,554.78-15,917.84

Finding the Fourth Proportional to 28,663.85, 39,554.78 and 15,917.84

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Solution

The fourth proportional to 28,663.85, 39,554.78 and 15,917.84 is: 21,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.85 : 39,554.78 = 15,917.84 : x
  2. Step 2: Convert to fraction form
    28,663.85/39,554.78 = 15,917.84/x
  3. Step 3: Cross multiply
    28,663.85x = 39,554.78 × 15,917.84
  4. Step 4: Simplify right side
    28,663.85x = 629,626,764.60
  5. Step 5: Solve for x
    x = 629,626,764.60/28,663.85
  6. Step 6: Final answer
    x = 21,965.88

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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.