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Finding the Fourth Proportional to 28,808.80, 43,164.60 and 13,985.80

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Solution

The fourth proportional to 28,808.80, 43,164.60 and 13,985.80 is: 20,955.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,808.80 : 43,164.60 = 13,985.80 : x
  2. Step 2: Convert to fraction form
    28,808.80/43,164.60 = 13,985.80/x
  3. Step 3: Cross multiply
    28,808.80x = 43,164.60 × 13,985.80
  4. Step 4: Simplify right side
    28,808.80x = 603,691,462.68
  5. Step 5: Solve for x
    x = 603,691,462.68/28,808.80
  6. Step 6: Final answer
    x = 20,955.11

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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.