Home / 18,965.60-28,425.33-13,420.54

Finding the Fourth Proportional to 18,965.60, 28,425.33 and 13,420.54

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Solution

The fourth proportional to 18,965.60, 28,425.33 and 13,420.54 is: 20,114.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.60 : 28,425.33 = 13,420.54 : x
  2. Step 2: Convert to fraction form
    18,965.60/28,425.33 = 13,420.54/x
  3. Step 3: Cross multiply
    18,965.60x = 28,425.33 × 13,420.54
  4. Step 4: Simplify right side
    18,965.60x = 381,483,278.28
  5. Step 5: Solve for x
    x = 381,483,278.28/18,965.60
  6. Step 6: Final answer
    x = 20,114.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.