Home / 7,985.86-11,989.83-5,514.58

Finding the Fourth Proportional to 7,985.86, 11,989.83 and 5,514.58

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Solution

The fourth proportional to 7,985.86, 11,989.83 and 5,514.58 is: 8,279.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.86 : 11,989.83 = 5,514.58 : x
  2. Step 2: Convert to fraction form
    7,985.86/11,989.83 = 5,514.58/x
  3. Step 3: Cross multiply
    7,985.86x = 11,989.83 × 5,514.58
  4. Step 4: Simplify right side
    7,985.86x = 66,118,876.72
  5. Step 5: Solve for x
    x = 66,118,876.72/7,985.86
  6. Step 6: Final answer
    x = 8,279.49

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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.