Home / 20,393.85-28,143.35-11,441.35

Finding the Fourth Proportional to 20,393.85, 28,143.35 and 11,441.35

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Solution

The fourth proportional to 20,393.85, 28,143.35 and 11,441.35 is: 15,788.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.85 : 28,143.35 = 11,441.35 : x
  2. Step 2: Convert to fraction form
    20,393.85/28,143.35 = 11,441.35/x
  3. Step 3: Cross multiply
    20,393.85x = 28,143.35 × 11,441.35
  4. Step 4: Simplify right side
    20,393.85x = 321,997,938.40
  5. Step 5: Solve for x
    x = 321,997,938.40/20,393.85
  6. Step 6: Final answer
    x = 15,788.97

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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.