Home / 28,780.24-43,172.10-12,123.64

Finding the Fourth Proportional to 28,780.24, 43,172.10 and 12,123.64

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Solution

The fourth proportional to 28,780.24, 43,172.10 and 12,123.64 is: 18,186.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.24 : 43,172.10 = 12,123.64 : x
  2. Step 2: Convert to fraction form
    28,780.24/43,172.10 = 12,123.64/x
  3. Step 3: Cross multiply
    28,780.24x = 43,172.10 × 12,123.64
  4. Step 4: Simplify right side
    28,780.24x = 523,402,998.44
  5. Step 5: Solve for x
    x = 523,402,998.44/28,780.24
  6. Step 6: Final answer
    x = 18,186.19

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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.