Home / 28,431.54-39,235.59-15,857.10

Finding the Fourth Proportional to 28,431.54, 39,235.59 and 15,857.10

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Solution

The fourth proportional to 28,431.54, 39,235.59 and 15,857.10 is: 21,882.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.54 : 39,235.59 = 15,857.10 : x
  2. Step 2: Convert to fraction form
    28,431.54/39,235.59 = 15,857.10/x
  3. Step 3: Cross multiply
    28,431.54x = 39,235.59 × 15,857.10
  4. Step 4: Simplify right side
    28,431.54x = 622,162,674.19
  5. Step 5: Solve for x
    x = 622,162,674.19/28,431.54
  6. Step 6: Final answer
    x = 21,882.83

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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.