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Finding the Fourth Proportional to 28,536.40, 42,806.66 and 8,812.41

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Solution

The fourth proportional to 28,536.40, 42,806.66 and 8,812.41 is: 13,219.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,536.40 : 42,806.66 = 8,812.41 : x
  2. Step 2: Convert to fraction form
    28,536.40/42,806.66 = 8,812.41/x
  3. Step 3: Cross multiply
    28,536.40x = 42,806.66 × 8,812.41
  4. Step 4: Simplify right side
    28,536.40x = 377,229,838.65
  5. Step 5: Solve for x
    x = 377,229,838.65/28,536.40
  6. Step 6: Final answer
    x = 13,219.25

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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.