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Finding the Fourth Proportional to 19,120, 26,388.48 and 11,672.32

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Solution

The fourth proportional to 19,120, 26,388.48 and 11,672.32 is: 16,109.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120 : 26,388.48 = 11,672.32 : x
  2. Step 2: Convert to fraction form
    19,120/26,388.48 = 11,672.32/x
  3. Step 3: Cross multiply
    19,120x = 26,388.48 × 11,672.32
  4. Step 4: Simplify right side
    19,120x = 308,014,782.87
  5. Step 5: Solve for x
    x = 308,014,782.87/19,120
  6. Step 6: Final answer
    x = 16,109.56

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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.