Home / 20,945.82-28,904.67-11,513.10

Finding the Fourth Proportional to 20,945.82, 28,904.67 and 11,513.10

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Solution

The fourth proportional to 20,945.82, 28,904.67 and 11,513.10 is: 15,887.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.82 : 28,904.67 = 11,513.10 : x
  2. Step 2: Convert to fraction form
    20,945.82/28,904.67 = 11,513.10/x
  3. Step 3: Cross multiply
    20,945.82x = 28,904.67 × 11,513.10
  4. Step 4: Simplify right side
    20,945.82x = 332,782,356.18
  5. Step 5: Solve for x
    x = 332,782,356.18/20,945.82
  6. Step 6: Final answer
    x = 15,887.77

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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.