Home / 14,138.80-21,208.20-4,279.60

Finding the Fourth Proportional to 14,138.80, 21,208.20 and 4,279.60

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Solution

The fourth proportional to 14,138.80, 21,208.20 and 4,279.60 is: 6,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.80 : 21,208.20 = 4,279.60 : x
  2. Step 2: Convert to fraction form
    14,138.80/21,208.20 = 4,279.60/x
  3. Step 3: Cross multiply
    14,138.80x = 21,208.20 × 4,279.60
  4. Step 4: Simplify right side
    14,138.80x = 90,762,612.72
  5. Step 5: Solve for x
    x = 90,762,612.72/14,138.80
  6. Step 6: Final answer
    x = 6,419.40

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Similar ratio
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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.