Home / 20,749.96-31,144.38-9,664.30

Finding the Fourth Proportional to 20,749.96, 31,144.38 and 9,664.30

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Solution

The fourth proportional to 20,749.96, 31,144.38 and 9,664.30 is: 14,505.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.96 : 31,144.38 = 9,664.30 : x
  2. Step 2: Convert to fraction form
    20,749.96/31,144.38 = 9,664.30/x
  3. Step 3: Cross multiply
    20,749.96x = 31,144.38 × 9,664.30
  4. Step 4: Simplify right side
    20,749.96x = 300,988,631.63
  5. Step 5: Solve for x
    x = 300,988,631.63/20,749.96
  6. Step 6: Final answer
    x = 14,505.50

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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.