Home / 19,871.28-27,422-10,918.34

Finding the Fourth Proportional to 19,871.28, 27,422 and 10,918.34

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Solution

The fourth proportional to 19,871.28, 27,422 and 10,918.34 is: 15,067.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.28 : 27,422 = 10,918.34 : x
  2. Step 2: Convert to fraction form
    19,871.28/27,422 = 10,918.34/x
  3. Step 3: Cross multiply
    19,871.28x = 27,422 × 10,918.34
  4. Step 4: Simplify right side
    19,871.28x = 299,402,719.48
  5. Step 5: Solve for x
    x = 299,402,719.48/19,871.28
  6. Step 6: Final answer
    x = 15,067.11

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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.