Home / 13,990.21-20,992.35-8,723.86

Finding the Fourth Proportional to 13,990.21, 20,992.35 and 8,723.86

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Solution

The fourth proportional to 13,990.21, 20,992.35 and 8,723.86 is: 13,090.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.21 : 20,992.35 = 8,723.86 : x
  2. Step 2: Convert to fraction form
    13,990.21/20,992.35 = 8,723.86/x
  3. Step 3: Cross multiply
    13,990.21x = 20,992.35 × 8,723.86
  4. Step 4: Simplify right side
    13,990.21x = 183,134,322.47
  5. Step 5: Solve for x
    x = 183,134,322.47/13,990.21
  6. Step 6: Final answer
    x = 13,090.18

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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.