Home / 28,185.88-38,896.52-15,439.12

Finding the Fourth Proportional to 28,185.88, 38,896.52 and 15,439.12

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Solution

The fourth proportional to 28,185.88, 38,896.52 and 15,439.12 is: 21,305.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.88 : 38,896.52 = 15,439.12 : x
  2. Step 2: Convert to fraction form
    28,185.88/38,896.52 = 15,439.12/x
  3. Step 3: Cross multiply
    28,185.88x = 38,896.52 × 15,439.12
  4. Step 4: Simplify right side
    28,185.88x = 600,528,039.86
  5. Step 5: Solve for x
    x = 600,528,039.86/28,185.88
  6. Step 6: Final answer
    x = 21,305.99

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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.