Home / 20,578.85-28,388.37-13,012.43

Finding the Fourth Proportional to 20,578.85, 28,388.37 and 13,012.43

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Solution

The fourth proportional to 20,578.85, 28,388.37 and 13,012.43 is: 17,950.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.85 : 28,388.37 = 13,012.43 : x
  2. Step 2: Convert to fraction form
    20,578.85/28,388.37 = 13,012.43/x
  3. Step 3: Cross multiply
    20,578.85x = 28,388.37 × 13,012.43
  4. Step 4: Simplify right side
    20,578.85x = 369,401,535.50
  5. Step 5: Solve for x
    x = 369,401,535.50/20,578.85
  6. Step 6: Final answer
    x = 17,950.55

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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.