Home / 13,989.35-20,986.07-8,720.04

Finding the Fourth Proportional to 13,989.35, 20,986.07 and 8,720.04

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Solution

The fourth proportional to 13,989.35, 20,986.07 and 8,720.04 is: 13,081.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.35 : 20,986.07 = 8,720.04 : x
  2. Step 2: Convert to fraction form
    13,989.35/20,986.07 = 8,720.04/x
  3. Step 3: Cross multiply
    13,989.35x = 20,986.07 × 8,720.04
  4. Step 4: Simplify right side
    13,989.35x = 182,999,326.24
  5. Step 5: Solve for x
    x = 182,999,326.24/13,989.35
  6. Step 6: Final answer
    x = 13,081.34

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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.