Home / 21,186.56-31,769.73-7,850.40

Finding the Fourth Proportional to 21,186.56, 31,769.73 and 7,850.40

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Solution

The fourth proportional to 21,186.56, 31,769.73 and 7,850.40 is: 11,771.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.56 : 31,769.73 = 7,850.40 : x
  2. Step 2: Convert to fraction form
    21,186.56/31,769.73 = 7,850.40/x
  3. Step 3: Cross multiply
    21,186.56x = 31,769.73 × 7,850.40
  4. Step 4: Simplify right side
    21,186.56x = 249,405,088.39
  5. Step 5: Solve for x
    x = 249,405,088.39/21,186.56
  6. Step 6: Final answer
    x = 11,771.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.