Home / 20,122.81-27,788.39-12,965.29

Finding the Fourth Proportional to 20,122.81, 27,788.39 and 12,965.29

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Solution

The fourth proportional to 20,122.81, 27,788.39 and 12,965.29 is: 17,904.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.81 : 27,788.39 = 12,965.29 : x
  2. Step 2: Convert to fraction form
    20,122.81/27,788.39 = 12,965.29/x
  3. Step 3: Cross multiply
    20,122.81x = 27,788.39 × 12,965.29
  4. Step 4: Simplify right side
    20,122.81x = 360,284,534.98
  5. Step 5: Solve for x
    x = 360,284,534.98/20,122.81
  6. Step 6: Final answer
    x = 17,904.29

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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.