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Finding the Fourth Proportional to 13,920.58, 20,880.06 and 4,059.64

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Solution

The fourth proportional to 13,920.58, 20,880.06 and 4,059.64 is: 6,089.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.58 : 20,880.06 = 4,059.64 : x
  2. Step 2: Convert to fraction form
    13,920.58/20,880.06 = 4,059.64/x
  3. Step 3: Cross multiply
    13,920.58x = 20,880.06 × 4,059.64
  4. Step 4: Simplify right side
    13,920.58x = 84,765,526.78
  5. Step 5: Solve for x
    x = 84,765,526.78/13,920.58
  6. Step 6: Final answer
    x = 6,089.22

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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.