Home / 11,721.74-16,176.44-6,686.78

Finding the Fourth Proportional to 11,721.74, 16,176.44 and 6,686.78

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Solution

The fourth proportional to 11,721.74, 16,176.44 and 6,686.78 is: 9,228.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.74 : 16,176.44 = 6,686.78 : x
  2. Step 2: Convert to fraction form
    11,721.74/16,176.44 = 6,686.78/x
  3. Step 3: Cross multiply
    11,721.74x = 16,176.44 × 6,686.78
  4. Step 4: Simplify right side
    11,721.74x = 108,168,231.30
  5. Step 5: Solve for x
    x = 108,168,231.30/11,721.74
  6. Step 6: Final answer
    x = 9,228.01

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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.