Home / 12,185.80-16,816.40-6,881.72

Finding the Fourth Proportional to 12,185.80, 16,816.40 and 6,881.72

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Solution

The fourth proportional to 12,185.80, 16,816.40 and 6,881.72 is: 9,496.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.80 : 16,816.40 = 6,881.72 : x
  2. Step 2: Convert to fraction form
    12,185.80/16,816.40 = 6,881.72/x
  3. Step 3: Cross multiply
    12,185.80x = 16,816.40 × 6,881.72
  4. Step 4: Simplify right side
    12,185.80x = 115,725,756.21
  5. Step 5: Solve for x
    x = 115,725,756.21/12,185.80
  6. Step 6: Final answer
    x = 9,496.77

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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.