Home / 28,529.54-39,367.73-15,780.70

Finding the Fourth Proportional to 28,529.54, 39,367.73 and 15,780.70

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Solution

The fourth proportional to 28,529.54, 39,367.73 and 15,780.70 is: 21,775.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.54 : 39,367.73 = 15,780.70 : x
  2. Step 2: Convert to fraction form
    28,529.54/39,367.73 = 15,780.70/x
  3. Step 3: Cross multiply
    28,529.54x = 39,367.73 × 15,780.70
  4. Step 4: Simplify right side
    28,529.54x = 621,250,277.84
  5. Step 5: Solve for x
    x = 621,250,277.84/28,529.54
  6. Step 6: Final answer
    x = 21,775.69

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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.