Home / 12,221.86-18,317.40-6,663.64

Finding the Fourth Proportional to 12,221.86, 18,317.40 and 6,663.64

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Solution

The fourth proportional to 12,221.86, 18,317.40 and 6,663.64 is: 9,987.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.86 : 18,317.40 = 6,663.64 : x
  2. Step 2: Convert to fraction form
    12,221.86/18,317.40 = 6,663.64/x
  3. Step 3: Cross multiply
    12,221.86x = 18,317.40 × 6,663.64
  4. Step 4: Simplify right side
    12,221.86x = 122,060,559.34
  5. Step 5: Solve for x
    x = 122,060,559.34/12,221.86
  6. Step 6: Final answer
    x = 9,987.07

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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.