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Finding the Fourth Proportional to 19,871.51, 27,424.80 and 11,914.48

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Solution

The fourth proportional to 19,871.51, 27,424.80 and 11,914.48 is: 16,443.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.51 : 27,424.80 = 11,914.48 : x
  2. Step 2: Convert to fraction form
    19,871.51/27,424.80 = 11,914.48/x
  3. Step 3: Cross multiply
    19,871.51x = 27,424.80 × 11,914.48
  4. Step 4: Simplify right side
    19,871.51x = 326,752,034.41
  5. Step 5: Solve for x
    x = 326,752,034.41/19,871.51
  6. Step 6: Final answer
    x = 16,443.24

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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.