Home / 12,111.28-18,166.80-7,177.36

Finding the Fourth Proportional to 12,111.28, 18,166.80 and 7,177.36

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Solution

The fourth proportional to 12,111.28, 18,166.80 and 7,177.36 is: 10,765.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.28 : 18,166.80 = 7,177.36 : x
  2. Step 2: Convert to fraction form
    12,111.28/18,166.80 = 7,177.36/x
  3. Step 3: Cross multiply
    12,111.28x = 18,166.80 × 7,177.36
  4. Step 4: Simplify right side
    12,111.28x = 130,389,663.65
  5. Step 5: Solve for x
    x = 130,389,663.65/12,111.28
  6. Step 6: Final answer
    x = 10,765.97

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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.