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Finding the Fourth Proportional to 20,210.79, 27,889.79 and 11,134.37

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Solution

The fourth proportional to 20,210.79, 27,889.79 and 11,134.37 is: 15,364.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.79 : 27,889.79 = 11,134.37 : x
  2. Step 2: Convert to fraction form
    20,210.79/27,889.79 = 11,134.37/x
  3. Step 3: Cross multiply
    20,210.79x = 27,889.79 × 11,134.37
  4. Step 4: Simplify right side
    20,210.79x = 310,535,255.13
  5. Step 5: Solve for x
    x = 310,535,255.13/20,210.79
  6. Step 6: Final answer
    x = 15,364.83

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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.