Home / 11,721.85-16,176.60-6,686.89

Finding the Fourth Proportional to 11,721.85, 16,176.60 and 6,686.89

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Solution

The fourth proportional to 11,721.85, 16,176.60 and 6,686.89 is: 9,228.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.85 : 16,176.60 = 6,686.89 : x
  2. Step 2: Convert to fraction form
    11,721.85/16,176.60 = 6,686.89/x
  3. Step 3: Cross multiply
    11,721.85x = 16,176.60 × 6,686.89
  4. Step 4: Simplify right side
    11,721.85x = 108,171,030.46
  5. Step 5: Solve for x
    x = 108,171,030.46/11,721.85
  6. Step 6: Final answer
    x = 9,228.16

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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.