Home / 28,351.80-39,126.78-15,777.36

Finding the Fourth Proportional to 28,351.80, 39,126.78 and 15,777.36

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Solution

The fourth proportional to 28,351.80, 39,126.78 and 15,777.36 is: 21,773.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,351.80 : 39,126.78 = 15,777.36 : x
  2. Step 2: Convert to fraction form
    28,351.80/39,126.78 = 15,777.36/x
  3. Step 3: Cross multiply
    28,351.80x = 39,126.78 × 15,777.36
  4. Step 4: Simplify right side
    28,351.80x = 617,317,293.70
  5. Step 5: Solve for x
    x = 617,317,293.70/28,351.80
  6. Step 6: Final answer
    x = 21,773.48

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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.