Home / 28,453.87-39,258.71-18,378.63

Finding the Fourth Proportional to 28,453.87, 39,258.71 and 18,378.63

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Solution

The fourth proportional to 28,453.87, 39,258.71 and 18,378.63 is: 25,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,453.87 : 39,258.71 = 18,378.63 : x
  2. Step 2: Convert to fraction form
    28,453.87/39,258.71 = 18,378.63/x
  3. Step 3: Cross multiply
    28,453.87x = 39,258.71 × 18,378.63
  4. Step 4: Simplify right side
    28,453.87x = 721,521,305.37
  5. Step 5: Solve for x
    x = 721,521,305.37/28,453.87
  6. Step 6: Final answer
    x = 25,357.58

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Find fourth proportional to 28,454.87, 39,260.09 and 18,379.63
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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.