Home / 11,985.60-16,540.20-6,680.51

Finding the Fourth Proportional to 11,985.60, 16,540.20 and 6,680.51

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Solution

The fourth proportional to 11,985.60, 16,540.20 and 6,680.51 is: 9,219.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.60 : 16,540.20 = 6,680.51 : x
  2. Step 2: Convert to fraction form
    11,985.60/16,540.20 = 6,680.51/x
  3. Step 3: Cross multiply
    11,985.60x = 16,540.20 × 6,680.51
  4. Step 4: Simplify right side
    11,985.60x = 110,496,888.80
  5. Step 5: Solve for x
    x = 110,496,888.80/11,985.60
  6. Step 6: Final answer
    x = 9,219.14

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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.