Home / 28,535.74-39,380.48-15,788.70

Finding the Fourth Proportional to 28,535.74, 39,380.48 and 15,788.70

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Solution

The fourth proportional to 28,535.74, 39,380.48 and 15,788.70 is: 21,789.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.74 : 39,380.48 = 15,788.70 : x
  2. Step 2: Convert to fraction form
    28,535.74/39,380.48 = 15,788.70/x
  3. Step 3: Cross multiply
    28,535.74x = 39,380.48 × 15,788.70
  4. Step 4: Simplify right side
    28,535.74x = 621,766,584.58
  5. Step 5: Solve for x
    x = 621,766,584.58/28,535.74
  6. Step 6: Final answer
    x = 21,789.05

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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.