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Finding the Fourth Proportional to 20,945.03, 31,407.68 and 7,608.63

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Solution

The fourth proportional to 20,945.03, 31,407.68 and 7,608.63 is: 11,409.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.03 : 31,407.68 = 7,608.63 : x
  2. Step 2: Convert to fraction form
    20,945.03/31,407.68 = 7,608.63/x
  3. Step 3: Cross multiply
    20,945.03x = 31,407.68 × 7,608.63
  4. Step 4: Simplify right side
    20,945.03x = 238,969,221.20
  5. Step 5: Solve for x
    x = 238,969,221.20/20,945.03
  6. Step 6: Final answer
    x = 11,409.35

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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.