Home / 12,857.12-19,285.68-5,456.39

Finding the Fourth Proportional to 12,857.12, 19,285.68 and 5,456.39

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Solution

The fourth proportional to 12,857.12, 19,285.68 and 5,456.39 is: 8,184.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.12 : 19,285.68 = 5,456.39 : x
  2. Step 2: Convert to fraction form
    12,857.12/19,285.68 = 5,456.39/x
  3. Step 3: Cross multiply
    12,857.12x = 19,285.68 × 5,456.39
  4. Step 4: Simplify right side
    12,857.12x = 105,230,139.08
  5. Step 5: Solve for x
    x = 105,230,139.08/12,857.12
  6. Step 6: Final answer
    x = 8,184.58

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.