Home / 12,060.80-18,107.40-7,686.80

Finding the Fourth Proportional to 12,060.80, 18,107.40 and 7,686.80

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Solution

The fourth proportional to 12,060.80, 18,107.40 and 7,686.80 is: 11,540.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,060.80 : 18,107.40 = 7,686.80 : x
  2. Step 2: Convert to fraction form
    12,060.80/18,107.40 = 7,686.80/x
  3. Step 3: Cross multiply
    12,060.80x = 18,107.40 × 7,686.80
  4. Step 4: Simplify right side
    12,060.80x = 139,187,962.32
  5. Step 5: Solve for x
    x = 139,187,962.32/12,060.80
  6. Step 6: Final answer
    x = 11,540.52

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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.