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Finding the Fourth Proportional to 28,989.18, 43,484.18 and 8,212.68

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Solution

The fourth proportional to 28,989.18, 43,484.18 and 8,212.68 is: 12,319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.18 : 43,484.18 = 8,212.68 : x
  2. Step 2: Convert to fraction form
    28,989.18/43,484.18 = 8,212.68/x
  3. Step 3: Cross multiply
    28,989.18x = 43,484.18 × 8,212.68
  4. Step 4: Simplify right side
    28,989.18x = 357,121,614.34
  5. Step 5: Solve for x
    x = 357,121,614.34/28,989.18
  6. Step 6: Final answer
    x = 12,319.13

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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.