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Finding the Fourth Proportional to 20,455.37, 30,638.08 and 16,905.14

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Solution

The fourth proportional to 20,455.37, 30,638.08 and 16,905.14 is: 25,320.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.37 : 30,638.08 = 16,905.14 : x
  2. Step 2: Convert to fraction form
    20,455.37/30,638.08 = 16,905.14/x
  3. Step 3: Cross multiply
    20,455.37x = 30,638.08 × 16,905.14
  4. Step 4: Simplify right side
    20,455.37x = 517,941,031.73
  5. Step 5: Solve for x
    x = 517,941,031.73/20,455.37
  6. Step 6: Final answer
    x = 25,320.54

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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.