Home / 20,269.36-27,971.64-11,316.78

Finding the Fourth Proportional to 20,269.36, 27,971.64 and 11,316.78

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Solution

The fourth proportional to 20,269.36, 27,971.64 and 11,316.78 is: 15,617.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269.36 : 27,971.64 = 11,316.78 : x
  2. Step 2: Convert to fraction form
    20,269.36/27,971.64 = 11,316.78/x
  3. Step 3: Cross multiply
    20,269.36x = 27,971.64 × 11,316.78
  4. Step 4: Simplify right side
    20,269.36x = 316,548,896.12
  5. Step 5: Solve for x
    x = 316,548,896.12/20,269.36
  6. Step 6: Final answer
    x = 15,617.11

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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.