Home / 12,656.82-18,987.97-6,420.23

Finding the Fourth Proportional to 12,656.82, 18,987.97 and 6,420.23

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Solution

The fourth proportional to 12,656.82, 18,987.97 and 6,420.23 is: 9,631.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.82 : 18,987.97 = 6,420.23 : x
  2. Step 2: Convert to fraction form
    12,656.82/18,987.97 = 6,420.23/x
  3. Step 3: Cross multiply
    12,656.82x = 18,987.97 × 6,420.23
  4. Step 4: Simplify right side
    12,656.82x = 121,907,106.89
  5. Step 5: Solve for x
    x = 121,907,106.89/12,656.82
  6. Step 6: Final answer
    x = 9,631.73

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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.