Home / 28,469.81-39,288.38-15,894.56

Finding the Fourth Proportional to 28,469.81, 39,288.38 and 15,894.56

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Solution

The fourth proportional to 28,469.81, 39,288.38 and 15,894.56 is: 21,934.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.81 : 39,288.38 = 15,894.56 : x
  2. Step 2: Convert to fraction form
    28,469.81/39,288.38 = 15,894.56/x
  3. Step 3: Cross multiply
    28,469.81x = 39,288.38 × 15,894.56
  4. Step 4: Simplify right side
    28,469.81x = 624,471,531.96
  5. Step 5: Solve for x
    x = 624,471,531.96/28,469.81
  6. Step 6: Final answer
    x = 21,934.52

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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.