Home / 20,213.70-30,331.35-9,122.10

Finding the Fourth Proportional to 20,213.70, 30,331.35 and 9,122.10

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Solution

The fourth proportional to 20,213.70, 30,331.35 and 9,122.10 is: 13,688.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,213.70 : 30,331.35 = 9,122.10 : x
  2. Step 2: Convert to fraction form
    20,213.70/30,331.35 = 9,122.10/x
  3. Step 3: Cross multiply
    20,213.70x = 30,331.35 × 9,122.10
  4. Step 4: Simplify right side
    20,213.70x = 276,685,607.84
  5. Step 5: Solve for x
    x = 276,685,607.84/20,213.70
  6. Step 6: Final answer
    x = 13,688.02

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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.