Home / 31,021.43-42,786.66-19,681.16

Finding the Fourth Proportional to 31,021.43, 42,786.66 and 19,681.16

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Solution

The fourth proportional to 31,021.43, 42,786.66 and 19,681.16 is: 27,145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,021.43 : 42,786.66 = 19,681.16 : x
  2. Step 2: Convert to fraction form
    31,021.43/42,786.66 = 19,681.16/x
  3. Step 3: Cross multiply
    31,021.43x = 42,786.66 × 19,681.16
  4. Step 4: Simplify right side
    31,021.43x = 842,091,101.33
  5. Step 5: Solve for x
    x = 842,091,101.33/31,021.43
  6. Step 6: Final answer
    x = 27,145.46

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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.