Home / 20,221.10-30,331.65-13,222.70

Finding the Fourth Proportional to 20,221.10, 30,331.65 and 13,222.70

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Solution

The fourth proportional to 20,221.10, 30,331.65 and 13,222.70 is: 19,834.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.10 : 30,331.65 = 13,222.70 : x
  2. Step 2: Convert to fraction form
    20,221.10/30,331.65 = 13,222.70/x
  3. Step 3: Cross multiply
    20,221.10x = 30,331.65 × 13,222.70
  4. Step 4: Simplify right side
    20,221.10x = 401,066,308.46
  5. Step 5: Solve for x
    x = 401,066,308.46/20,221.10
  6. Step 6: Final answer
    x = 19,834.05

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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.