Home / 28,278.75-39,025.89-15,703.50

Finding the Fourth Proportional to 28,278.75, 39,025.89 and 15,703.50

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Solution

The fourth proportional to 28,278.75, 39,025.89 and 15,703.50 is: 21,671.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.75 : 39,025.89 = 15,703.50 : x
  2. Step 2: Convert to fraction form
    28,278.75/39,025.89 = 15,703.50/x
  3. Step 3: Cross multiply
    28,278.75x = 39,025.89 × 15,703.50
  4. Step 4: Simplify right side
    28,278.75x = 612,843,063.62
  5. Step 5: Solve for x
    x = 612,843,063.62/28,278.75
  6. Step 6: Final answer
    x = 21,671.50

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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.