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Finding the Fourth Proportional to 20,239.58, 30,368.09 and 10,868.64

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Solution

The fourth proportional to 20,239.58, 30,368.09 and 10,868.64 is: 16,307.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.58 : 30,368.09 = 10,868.64 : x
  2. Step 2: Convert to fraction form
    20,239.58/30,368.09 = 10,868.64/x
  3. Step 3: Cross multiply
    20,239.58x = 30,368.09 × 10,868.64
  4. Step 4: Simplify right side
    20,239.58x = 330,059,837.70
  5. Step 5: Solve for x
    x = 330,059,837.70/20,239.58
  6. Step 6: Final answer
    x = 16,307.64

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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.