Home / 28,317.36-39,078.10-15,571.36

Finding the Fourth Proportional to 28,317.36, 39,078.10 and 15,571.36

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Solution

The fourth proportional to 28,317.36, 39,078.10 and 15,571.36 is: 21,488.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.36 : 39,078.10 = 15,571.36 : x
  2. Step 2: Convert to fraction form
    28,317.36/39,078.10 = 15,571.36/x
  3. Step 3: Cross multiply
    28,317.36x = 39,078.10 × 15,571.36
  4. Step 4: Simplify right side
    28,317.36x = 608,499,231.53
  5. Step 5: Solve for x
    x = 608,499,231.53/28,317.36
  6. Step 6: Final answer
    x = 21,488.56

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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.