Home / 31,186.28-43,051.23-19,871.30

Finding the Fourth Proportional to 31,186.28, 43,051.23 and 19,871.30

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Solution

The fourth proportional to 31,186.28, 43,051.23 and 19,871.30 is: 27,431.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186.28 : 43,051.23 = 19,871.30 : x
  2. Step 2: Convert to fraction form
    31,186.28/43,051.23 = 19,871.30/x
  3. Step 3: Cross multiply
    31,186.28x = 43,051.23 × 19,871.30
  4. Step 4: Simplify right side
    31,186.28x = 855,484,014.33
  5. Step 5: Solve for x
    x = 855,484,014.33/31,186.28
  6. Step 6: Final answer
    x = 27,431.42

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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.