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Finding the Fourth Proportional to 20,190.51, 27,894.51 and 15,427.13

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Solution

The fourth proportional to 20,190.51, 27,894.51 and 15,427.13 is: 21,313.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.51 : 27,894.51 = 15,427.13 : x
  2. Step 2: Convert to fraction form
    20,190.51/27,894.51 = 15,427.13/x
  3. Step 3: Cross multiply
    20,190.51x = 27,894.51 × 15,427.13
  4. Step 4: Simplify right side
    20,190.51x = 430,332,015.45
  5. Step 5: Solve for x
    x = 430,332,015.45/20,190.51
  6. Step 6: Final answer
    x = 21,313.58

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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.