Home / 12,936.80-17,842.34-8,686.58

Finding the Fourth Proportional to 12,936.80, 17,842.34 and 8,686.58

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Solution

The fourth proportional to 12,936.80, 17,842.34 and 8,686.58 is: 11,980.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.80 : 17,842.34 = 8,686.58 : x
  2. Step 2: Convert to fraction form
    12,936.80/17,842.34 = 8,686.58/x
  3. Step 3: Cross multiply
    12,936.80x = 17,842.34 × 8,686.58
  4. Step 4: Simplify right side
    12,936.80x = 154,988,781.15
  5. Step 5: Solve for x
    x = 154,988,781.15/12,936.80
  6. Step 6: Final answer
    x = 11,980.46

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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.