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Finding the Fourth Proportional to 13,458.88, 20,191.58 and 4,224.88

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Solution

The fourth proportional to 13,458.88, 20,191.58 and 4,224.88 is: 6,338.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.88 : 20,191.58 = 4,224.88 : x
  2. Step 2: Convert to fraction form
    13,458.88/20,191.58 = 4,224.88/x
  3. Step 3: Cross multiply
    13,458.88x = 20,191.58 × 4,224.88
  4. Step 4: Simplify right side
    13,458.88x = 85,307,002.51
  5. Step 5: Solve for x
    x = 85,307,002.51/13,458.88
  6. Step 6: Final answer
    x = 6,338.34

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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.