Home / 20,782.36-28,679.16-12,284.38

Finding the Fourth Proportional to 20,782.36, 28,679.16 and 12,284.38

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Solution

The fourth proportional to 20,782.36, 28,679.16 and 12,284.38 is: 16,952.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.36 : 28,679.16 = 12,284.38 : x
  2. Step 2: Convert to fraction form
    20,782.36/28,679.16 = 12,284.38/x
  3. Step 3: Cross multiply
    20,782.36x = 28,679.16 × 12,284.38
  4. Step 4: Simplify right side
    20,782.36x = 352,305,699.52
  5. Step 5: Solve for x
    x = 352,305,699.52/20,782.36
  6. Step 6: Final answer
    x = 16,952.15

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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.