Home / 12,120.58-16,726.42-6,815.36

Finding the Fourth Proportional to 12,120.58, 16,726.42 and 6,815.36

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Solution

The fourth proportional to 12,120.58, 16,726.42 and 6,815.36 is: 9,405.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.58 : 16,726.42 = 6,815.36 : x
  2. Step 2: Convert to fraction form
    12,120.58/16,726.42 = 6,815.36/x
  3. Step 3: Cross multiply
    12,120.58x = 16,726.42 × 6,815.36
  4. Step 4: Simplify right side
    12,120.58x = 113,996,573.81
  5. Step 5: Solve for x
    x = 113,996,573.81/12,120.58
  6. Step 6: Final answer
    x = 9,405.21

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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.