Home / 28,518.94-39,356.01-15,772.78

Finding the Fourth Proportional to 28,518.94, 39,356.01 and 15,772.78

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Solution

The fourth proportional to 28,518.94, 39,356.01 and 15,772.78 is: 21,766.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.94 : 39,356.01 = 15,772.78 : x
  2. Step 2: Convert to fraction form
    28,518.94/39,356.01 = 15,772.78/x
  3. Step 3: Cross multiply
    28,518.94x = 39,356.01 × 15,772.78
  4. Step 4: Simplify right side
    28,518.94x = 620,753,687.41
  5. Step 5: Solve for x
    x = 620,753,687.41/28,518.94
  6. Step 6: Final answer
    x = 21,766.37

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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.