Home / 13,989.64-20,984.73-4,129.12

Finding the Fourth Proportional to 13,989.64, 20,984.73 and 4,129.12

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Solution

The fourth proportional to 13,989.64, 20,984.73 and 4,129.12 is: 6,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.64 : 20,984.73 = 4,129.12 : x
  2. Step 2: Convert to fraction form
    13,989.64/20,984.73 = 4,129.12/x
  3. Step 3: Cross multiply
    13,989.64x = 20,984.73 × 4,129.12
  4. Step 4: Simplify right side
    13,989.64x = 86,648,468.34
  5. Step 5: Solve for x
    x = 86,648,468.34/13,989.64
  6. Step 6: Final answer
    x = 6,193.76

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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.