Home / 19,871.10-27,421.56-10,918.60

Finding the Fourth Proportional to 19,871.10, 27,421.56 and 10,918.60

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Solution

The fourth proportional to 19,871.10, 27,421.56 and 10,918.60 is: 15,067.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.10 : 27,421.56 = 10,918.60 : x
  2. Step 2: Convert to fraction form
    19,871.10/27,421.56 = 10,918.60/x
  3. Step 3: Cross multiply
    19,871.10x = 27,421.56 × 10,918.60
  4. Step 4: Simplify right side
    19,871.10x = 299,405,007.17
  5. Step 5: Solve for x
    x = 299,405,007.17/19,871.10
  6. Step 6: Final answer
    x = 15,067.36

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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.