Home / 20,858.81-31,102.14-18,540.59

Finding the Fourth Proportional to 20,858.81, 31,102.14 and 18,540.59

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Solution

The fourth proportional to 20,858.81, 31,102.14 and 18,540.59 is: 27,645.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.81 : 31,102.14 = 18,540.59 : x
  2. Step 2: Convert to fraction form
    20,858.81/31,102.14 = 18,540.59/x
  3. Step 3: Cross multiply
    20,858.81x = 31,102.14 × 18,540.59
  4. Step 4: Simplify right side
    20,858.81x = 576,651,870.35
  5. Step 5: Solve for x
    x = 576,651,870.35/20,858.81
  6. Step 6: Final answer
    x = 27,645.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.