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Finding the Fourth Proportional to 28,535.40, 42,805.16 and 8,811.41

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Solution

The fourth proportional to 28,535.40, 42,805.16 and 8,811.41 is: 13,217.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.40 : 42,805.16 = 8,811.41 : x
  2. Step 2: Convert to fraction form
    28,535.40/42,805.16 = 8,811.41/x
  3. Step 3: Cross multiply
    28,535.40x = 42,805.16 × 8,811.41
  4. Step 4: Simplify right side
    28,535.40x = 377,173,556.79
  5. Step 5: Solve for x
    x = 377,173,556.79/28,535.40
  6. Step 6: Final answer
    x = 13,217.74

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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.