Home / 28,930.60-43,412.10-12,287.80

Finding the Fourth Proportional to 28,930.60, 43,412.10 and 12,287.80

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Solution

The fourth proportional to 28,930.60, 43,412.10 and 12,287.80 is: 18,438.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.60 : 43,412.10 = 12,287.80 : x
  2. Step 2: Convert to fraction form
    28,930.60/43,412.10 = 12,287.80/x
  3. Step 3: Cross multiply
    28,930.60x = 43,412.10 × 12,287.80
  4. Step 4: Simplify right side
    28,930.60x = 533,439,202.38
  5. Step 5: Solve for x
    x = 533,439,202.38/28,930.60
  6. Step 6: Final answer
    x = 18,438.58

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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.