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Finding the Fourth Proportional to 20,603.92, 30,887.64 and 8,910.76

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Solution

The fourth proportional to 20,603.92, 30,887.64 and 8,910.76 is: 13,358.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.92 : 30,887.64 = 8,910.76 : x
  2. Step 2: Convert to fraction form
    20,603.92/30,887.64 = 8,910.76/x
  3. Step 3: Cross multiply
    20,603.92x = 30,887.64 × 8,910.76
  4. Step 4: Simplify right side
    20,603.92x = 275,232,347.01
  5. Step 5: Solve for x
    x = 275,232,347.01/20,603.92
  6. Step 6: Final answer
    x = 13,358.25

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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.