Home / 28,390.50-39,180.24-15,815.25

Finding the Fourth Proportional to 28,390.50, 39,180.24 and 15,815.25

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Solution

The fourth proportional to 28,390.50, 39,180.24 and 15,815.25 is: 21,825.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.50 : 39,180.24 = 15,815.25 : x
  2. Step 2: Convert to fraction form
    28,390.50/39,180.24 = 15,815.25/x
  3. Step 3: Cross multiply
    28,390.50x = 39,180.24 × 15,815.25
  4. Step 4: Simplify right side
    28,390.50x = 619,645,290.66
  5. Step 5: Solve for x
    x = 619,645,290.66/28,390.50
  6. Step 6: Final answer
    x = 21,825.80

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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.