Home / 18,420.39-25,429.73-14,378.54

Finding the Fourth Proportional to 18,420.39, 25,429.73 and 14,378.54

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Solution

The fourth proportional to 18,420.39, 25,429.73 and 14,378.54 is: 19,849.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.39 : 25,429.73 = 14,378.54 : x
  2. Step 2: Convert to fraction form
    18,420.39/25,429.73 = 14,378.54/x
  3. Step 3: Cross multiply
    18,420.39x = 25,429.73 × 14,378.54
  4. Step 4: Simplify right side
    18,420.39x = 365,642,190.95
  5. Step 5: Solve for x
    x = 365,642,190.95/18,420.39
  6. Step 6: Final answer
    x = 19,849.86

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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.