Home / 28,290.25-39,040.55-21,583.45

Finding the Fourth Proportional to 28,290.25, 39,040.55 and 21,583.45

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Solution

The fourth proportional to 28,290.25, 39,040.55 and 21,583.45 is: 29,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.25 : 39,040.55 = 21,583.45 : x
  2. Step 2: Convert to fraction form
    28,290.25/39,040.55 = 21,583.45/x
  3. Step 3: Cross multiply
    28,290.25x = 39,040.55 × 21,583.45
  4. Step 4: Simplify right side
    28,290.25x = 842,629,758.90
  5. Step 5: Solve for x
    x = 842,629,758.90/28,290.25
  6. Step 6: Final answer
    x = 29,785.16

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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.