Home / 20,418.60-28,175.94-11,465.40

Finding the Fourth Proportional to 20,418.60, 28,175.94 and 11,465.40

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Solution

The fourth proportional to 20,418.60, 28,175.94 and 11,465.40 is: 15,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.60 : 28,175.94 = 11,465.40 : x
  2. Step 2: Convert to fraction form
    20,418.60/28,175.94 = 11,465.40/x
  3. Step 3: Cross multiply
    20,418.60x = 28,175.94 × 11,465.40
  4. Step 4: Simplify right side
    20,418.60x = 323,048,422.48
  5. Step 5: Solve for x
    x = 323,048,422.48/20,418.60
  6. Step 6: Final answer
    x = 15,821.28

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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.