Home / 14,138.28-21,207.42-4,778.34

Finding the Fourth Proportional to 14,138.28, 21,207.42 and 4,778.34

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Solution

The fourth proportional to 14,138.28, 21,207.42 and 4,778.34 is: 7,167.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.28 : 21,207.42 = 4,778.34 : x
  2. Step 2: Convert to fraction form
    14,138.28/21,207.42 = 4,778.34/x
  3. Step 3: Cross multiply
    14,138.28x = 21,207.42 × 4,778.34
  4. Step 4: Simplify right side
    14,138.28x = 101,336,263.28
  5. Step 5: Solve for x
    x = 101,336,263.28/14,138.28
  6. Step 6: Final answer
    x = 7,167.51

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Double scale
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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.