Home / 28,857.06-39,811.50-19,431.90

Finding the Fourth Proportional to 28,857.06, 39,811.50 and 19,431.90

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Solution

The fourth proportional to 28,857.06, 39,811.50 and 19,431.90 is: 26,808.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.06 : 39,811.50 = 19,431.90 : x
  2. Step 2: Convert to fraction form
    28,857.06/39,811.50 = 19,431.90/x
  3. Step 3: Cross multiply
    28,857.06x = 39,811.50 × 19,431.90
  4. Step 4: Simplify right side
    28,857.06x = 773,613,086.85
  5. Step 5: Solve for x
    x = 773,613,086.85/28,857.06
  6. Step 6: Final answer
    x = 26,808.45

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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.