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Finding the Fourth Proportional to 28,808.76, 43,221.48 and 12,160

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Solution

The fourth proportional to 28,808.76, 43,221.48 and 12,160 is: 18,243.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,808.76 : 43,221.48 = 12,160 : x
  2. Step 2: Convert to fraction form
    28,808.76/43,221.48 = 12,160/x
  3. Step 3: Cross multiply
    28,808.76x = 43,221.48 × 12,160
  4. Step 4: Simplify right side
    28,808.76x = 525,573,196.80
  5. Step 5: Solve for x
    x = 525,573,196.80/28,808.76
  6. Step 6: Final answer
    x = 18,243.52

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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.