Home / 12,651.12-18,988.26-6,415.44

Finding the Fourth Proportional to 12,651.12, 18,988.26 and 6,415.44

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Solution

The fourth proportional to 12,651.12, 18,988.26 and 6,415.44 is: 9,629.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.12 : 18,988.26 = 6,415.44 : x
  2. Step 2: Convert to fraction form
    12,651.12/18,988.26 = 6,415.44/x
  3. Step 3: Cross multiply
    12,651.12x = 18,988.26 × 6,415.44
  4. Step 4: Simplify right side
    12,651.12x = 121,818,054.64
  5. Step 5: Solve for x
    x = 121,818,054.64/12,651.12
  6. Step 6: Final answer
    x = 9,629.03

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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.