Home / 28,318.74-39,078.36-15,571.68

Finding the Fourth Proportional to 28,318.74, 39,078.36 and 15,571.68

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Solution

The fourth proportional to 28,318.74, 39,078.36 and 15,571.68 is: 21,488.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.74 : 39,078.36 = 15,571.68 : x
  2. Step 2: Convert to fraction form
    28,318.74/39,078.36 = 15,571.68/x
  3. Step 3: Cross multiply
    28,318.74x = 39,078.36 × 15,571.68
  4. Step 4: Simplify right side
    28,318.74x = 608,515,716.84
  5. Step 5: Solve for x
    x = 608,515,716.84/28,318.74
  6. Step 6: Final answer
    x = 21,488.09

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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.