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Finding the Fourth Proportional to 19,486.31, 26,873.44 and 12,769.47

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Solution

The fourth proportional to 19,486.31, 26,873.44 and 12,769.47 is: 17,610.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,486.31 : 26,873.44 = 12,769.47 : x
  2. Step 2: Convert to fraction form
    19,486.31/26,873.44 = 12,769.47/x
  3. Step 3: Cross multiply
    19,486.31x = 26,873.44 × 12,769.47
  4. Step 4: Simplify right side
    19,486.31x = 343,159,585.88
  5. Step 5: Solve for x
    x = 343,159,585.88/19,486.31
  6. Step 6: Final answer
    x = 17,610.29

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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.