Home / 28,431.52-39,234-15,856.96

Finding the Fourth Proportional to 28,431.52, 39,234 and 15,856.96

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Solution

The fourth proportional to 28,431.52, 39,234 and 15,856.96 is: 21,881.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.52 : 39,234 = 15,856.96 : x
  2. Step 2: Convert to fraction form
    28,431.52/39,234 = 15,856.96/x
  3. Step 3: Cross multiply
    28,431.52x = 39,234 × 15,856.96
  4. Step 4: Simplify right side
    28,431.52x = 622,131,968.64
  5. Step 5: Solve for x
    x = 622,131,968.64/28,431.52
  6. Step 6: Final answer
    x = 21,881.77

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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.