Home / 12,486.28-17,230.78-6,820.82

Finding the Fourth Proportional to 12,486.28, 17,230.78 and 6,820.82

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Solution

The fourth proportional to 12,486.28, 17,230.78 and 6,820.82 is: 9,412.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.28 : 17,230.78 = 6,820.82 : x
  2. Step 2: Convert to fraction form
    12,486.28/17,230.78 = 6,820.82/x
  3. Step 3: Cross multiply
    12,486.28x = 17,230.78 × 6,820.82
  4. Step 4: Simplify right side
    12,486.28x = 117,528,048.84
  5. Step 5: Solve for x
    x = 117,528,048.84/12,486.28
  6. Step 6: Final answer
    x = 9,412.58

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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.