Home / 20,221.56-30,312.42-9,679.44

Finding the Fourth Proportional to 20,221.56, 30,312.42 and 9,679.44

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Solution

The fourth proportional to 20,221.56, 30,312.42 and 9,679.44 is: 14,509.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.56 : 30,312.42 = 9,679.44 : x
  2. Step 2: Convert to fraction form
    20,221.56/30,312.42 = 9,679.44/x
  3. Step 3: Cross multiply
    20,221.56x = 30,312.42 × 9,679.44
  4. Step 4: Simplify right side
    20,221.56x = 293,407,250.64
  5. Step 5: Solve for x
    x = 293,407,250.64/20,221.56
  6. Step 6: Final answer
    x = 14,509.62

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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.