Home / 8,426.39-12,639.53-2,186.39

Finding the Fourth Proportional to 8,426.39, 12,639.53 and 2,186.39

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Solution

The fourth proportional to 8,426.39, 12,639.53 and 2,186.39 is: 3,279.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.39 : 12,639.53 = 2,186.39 : x
  2. Step 2: Convert to fraction form
    8,426.39/12,639.53 = 2,186.39/x
  3. Step 3: Cross multiply
    8,426.39x = 12,639.53 × 2,186.39
  4. Step 4: Simplify right side
    8,426.39x = 27,634,979.06
  5. Step 5: Solve for x
    x = 27,634,979.06/8,426.39
  6. Step 6: Final answer
    x = 3,279.58

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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.