Home / 21,346.56-31,939.68-20,221.56

Finding the Fourth Proportional to 21,346.56, 31,939.68 and 20,221.56

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Solution

The fourth proportional to 21,346.56, 31,939.68 and 20,221.56 is: 30,256.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.56 : 31,939.68 = 20,221.56 : x
  2. Step 2: Convert to fraction form
    21,346.56/31,939.68 = 20,221.56/x
  3. Step 3: Cross multiply
    21,346.56x = 31,939.68 × 20,221.56
  4. Step 4: Simplify right side
    21,346.56x = 645,870,155.50
  5. Step 5: Solve for x
    x = 645,870,155.50/21,346.56
  6. Step 6: Final answer
    x = 30,256.40

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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.