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Finding the Fourth Proportional to 21,703.20, 32,624.40 and 20,162.40

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Solution

The fourth proportional to 21,703.20, 32,624.40 and 20,162.40 is: 30,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.20 : 32,624.40 = 20,162.40 : x
  2. Step 2: Convert to fraction form
    21,703.20/32,624.40 = 20,162.40/x
  3. Step 3: Cross multiply
    21,703.20x = 32,624.40 × 20,162.40
  4. Step 4: Simplify right side
    21,703.20x = 657,786,202.56
  5. Step 5: Solve for x
    x = 657,786,202.56/21,703.20
  6. Step 6: Final answer
    x = 30,308.26

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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.