Home / 28,286.43-42,390.19-21,258.22

Finding the Fourth Proportional to 28,286.43, 42,390.19 and 21,258.22

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Solution

The fourth proportional to 28,286.43, 42,390.19 and 21,258.22 is: 31,857.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.43 : 42,390.19 = 21,258.22 : x
  2. Step 2: Convert to fraction form
    28,286.43/42,390.19 = 21,258.22/x
  3. Step 3: Cross multiply
    28,286.43x = 42,390.19 × 21,258.22
  4. Step 4: Simplify right side
    28,286.43x = 901,139,947.45
  5. Step 5: Solve for x
    x = 901,139,947.45/28,286.43
  6. Step 6: Final answer
    x = 31,857.68

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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.