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Finding the Fourth Proportional to 28,235.56, 38,963.56 and 15,659.52

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Solution

The fourth proportional to 28,235.56, 38,963.56 and 15,659.52 is: 21,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,235.56 : 38,963.56 = 15,659.52 : x
  2. Step 2: Convert to fraction form
    28,235.56/38,963.56 = 15,659.52/x
  3. Step 3: Cross multiply
    28,235.56x = 38,963.56 × 15,659.52
  4. Step 4: Simplify right side
    28,235.56x = 610,150,647.09
  5. Step 5: Solve for x
    x = 610,150,647.09/28,235.56
  6. Step 6: Final answer
    x = 21,609.30

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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.