Home / 28,317.73-39,078.49-15,571.12

Finding the Fourth Proportional to 28,317.73, 39,078.49 and 15,571.12

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Solution

The fourth proportional to 28,317.73, 39,078.49 and 15,571.12 is: 21,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.73 : 39,078.49 = 15,571.12 : x
  2. Step 2: Convert to fraction form
    28,317.73/39,078.49 = 15,571.12/x
  3. Step 3: Cross multiply
    28,317.73x = 39,078.49 × 15,571.12
  4. Step 4: Simplify right side
    28,317.73x = 608,495,857.21
  5. Step 5: Solve for x
    x = 608,495,857.21/28,317.73
  6. Step 6: Final answer
    x = 21,488.16

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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.