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Finding the Fourth Proportional to 23,208.72, 31,991.72 and 19,425.21

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Solution

The fourth proportional to 23,208.72, 31,991.72 and 19,425.21 is: 26,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,208.72 : 31,991.72 = 19,425.21 : x
  2. Step 2: Convert to fraction form
    23,208.72/31,991.72 = 19,425.21/x
  3. Step 3: Cross multiply
    23,208.72x = 31,991.72 × 19,425.21
  4. Step 4: Simplify right side
    23,208.72x = 621,445,879.26
  5. Step 5: Solve for x
    x = 621,445,879.26/23,208.72
  6. Step 6: Final answer
    x = 26,776.40

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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.