Home / 13,749.50-20,615-6,349.88

Finding the Fourth Proportional to 13,749.50, 20,615 and 6,349.88

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Solution

The fourth proportional to 13,749.50, 20,615 and 6,349.88 is: 9,520.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.50 : 20,615 = 6,349.88 : x
  2. Step 2: Convert to fraction form
    13,749.50/20,615 = 6,349.88/x
  3. Step 3: Cross multiply
    13,749.50x = 20,615 × 6,349.88
  4. Step 4: Simplify right side
    13,749.50x = 130,902,776.20
  5. Step 5: Solve for x
    x = 130,902,776.20/13,749.50
  6. Step 6: Final answer
    x = 9,520.55

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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.