Home / 11,985.56-16,540.15-6,680.72

Finding the Fourth Proportional to 11,985.56, 16,540.15 and 6,680.72

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Solution

The fourth proportional to 11,985.56, 16,540.15 and 6,680.72 is: 9,219.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.56 : 16,540.15 = 6,680.72 : x
  2. Step 2: Convert to fraction form
    11,985.56/16,540.15 = 6,680.72/x
  3. Step 3: Cross multiply
    11,985.56x = 16,540.15 × 6,680.72
  4. Step 4: Simplify right side
    11,985.56x = 110,500,044.91
  5. Step 5: Solve for x
    x = 110,500,044.91/11,985.56
  6. Step 6: Final answer
    x = 9,219.43

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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.