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Finding the Fourth Proportional to 13,503.70, 20,255.67 and 4,143.70

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Solution

The fourth proportional to 13,503.70, 20,255.67 and 4,143.70 is: 6,215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.70 : 20,255.67 = 4,143.70 : x
  2. Step 2: Convert to fraction form
    13,503.70/20,255.67 = 4,143.70/x
  3. Step 3: Cross multiply
    13,503.70x = 20,255.67 × 4,143.70
  4. Step 4: Simplify right side
    13,503.70x = 83,933,419.78
  5. Step 5: Solve for x
    x = 83,933,419.78/13,503.70
  6. Step 6: Final answer
    x = 6,215.59

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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.