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Finding the Fourth Proportional to 20,646.60, 30,905.10 and 16,240.20

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Solution

The fourth proportional to 20,646.60, 30,905.10 and 16,240.20 is: 24,309.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.60 : 30,905.10 = 16,240.20 : x
  2. Step 2: Convert to fraction form
    20,646.60/30,905.10 = 16,240.20/x
  3. Step 3: Cross multiply
    20,646.60x = 30,905.10 × 16,240.20
  4. Step 4: Simplify right side
    20,646.60x = 501,905,005.02
  5. Step 5: Solve for x
    x = 501,905,005.02/20,646.60
  6. Step 6: Final answer
    x = 24,309.33

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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.