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Finding the Fourth Proportional to 20,236.58, 30,363.59 and 10,865.64

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Solution

The fourth proportional to 20,236.58, 30,363.59 and 10,865.64 is: 16,303.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,236.58 : 30,363.59 = 10,865.64 : x
  2. Step 2: Convert to fraction form
    20,236.58/30,363.59 = 10,865.64/x
  3. Step 3: Cross multiply
    20,236.58x = 30,363.59 × 10,865.64
  4. Step 4: Simplify right side
    20,236.58x = 329,919,979.08
  5. Step 5: Solve for x
    x = 329,919,979.08/20,236.58
  6. Step 6: Final answer
    x = 16,303.15

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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.