Home / 12,705.08-17,530.88-7,986

Finding the Fourth Proportional to 12,705.08, 17,530.88 and 7,986

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Solution

The fourth proportional to 12,705.08, 17,530.88 and 7,986 is: 11,019.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,705.08 : 17,530.88 = 7,986 : x
  2. Step 2: Convert to fraction form
    12,705.08/17,530.88 = 7,986/x
  3. Step 3: Cross multiply
    12,705.08x = 17,530.88 × 7,986
  4. Step 4: Simplify right side
    12,705.08x = 140,001,607.68
  5. Step 5: Solve for x
    x = 140,001,607.68/12,705.08
  6. Step 6: Final answer
    x = 11,019.34

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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.