Home / 12,808.35-19,186.59-6,639.39

Finding the Fourth Proportional to 12,808.35, 19,186.59 and 6,639.39

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Solution

The fourth proportional to 12,808.35, 19,186.59 and 6,639.39 is: 9,945.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.35 : 19,186.59 = 6,639.39 : x
  2. Step 2: Convert to fraction form
    12,808.35/19,186.59 = 6,639.39/x
  3. Step 3: Cross multiply
    12,808.35x = 19,186.59 × 6,639.39
  4. Step 4: Simplify right side
    12,808.35x = 127,387,253.78
  5. Step 5: Solve for x
    x = 127,387,253.78/12,808.35
  6. Step 6: Final answer
    x = 9,945.64

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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.