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Finding the Fourth Proportional to 19,661.64, 27,133.11 and 10,709.19

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Solution

The fourth proportional to 19,661.64, 27,133.11 and 10,709.19 is: 14,778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.64 : 27,133.11 = 10,709.19 : x
  2. Step 2: Convert to fraction form
    19,661.64/27,133.11 = 10,709.19/x
  3. Step 3: Cross multiply
    19,661.64x = 27,133.11 × 10,709.19
  4. Step 4: Simplify right side
    19,661.64x = 290,573,630.28
  5. Step 5: Solve for x
    x = 290,573,630.28/19,661.64
  6. Step 6: Final answer
    x = 14,778.71

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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.