Home / 12,486.21-17,230.87-6,820.96

Finding the Fourth Proportional to 12,486.21, 17,230.87 and 6,820.96

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Solution

The fourth proportional to 12,486.21, 17,230.87 and 6,820.96 is: 9,412.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.21 : 17,230.87 = 6,820.96 : x
  2. Step 2: Convert to fraction form
    12,486.21/17,230.87 = 6,820.96/x
  3. Step 3: Cross multiply
    12,486.21x = 17,230.87 × 6,820.96
  4. Step 4: Simplify right side
    12,486.21x = 117,531,075.04
  5. Step 5: Solve for x
    x = 117,531,075.04/12,486.21
  6. Step 6: Final answer
    x = 9,412.87

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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.