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Finding the Fourth Proportional to 18,805.69, 28,213.40 and 10,038.25

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Solution

The fourth proportional to 18,805.69, 28,213.40 and 10,038.25 is: 15,059.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.69 : 28,213.40 = 10,038.25 : x
  2. Step 2: Convert to fraction form
    18,805.69/28,213.40 = 10,038.25/x
  3. Step 3: Cross multiply
    18,805.69x = 28,213.40 × 10,038.25
  4. Step 4: Simplify right side
    18,805.69x = 283,213,162.55
  5. Step 5: Solve for x
    x = 283,213,162.55/18,805.69
  6. Step 6: Final answer
    x = 15,059.97

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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.