Home / 28,553.72-42,819.64-11,921.58

Finding the Fourth Proportional to 28,553.72, 42,819.64 and 11,921.58

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Solution

The fourth proportional to 28,553.72, 42,819.64 and 11,921.58 is: 17,877.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,553.72 : 42,819.64 = 11,921.58 : x
  2. Step 2: Convert to fraction form
    28,553.72/42,819.64 = 11,921.58/x
  3. Step 3: Cross multiply
    28,553.72x = 42,819.64 × 11,921.58
  4. Step 4: Simplify right side
    28,553.72x = 510,477,734.03
  5. Step 5: Solve for x
    x = 510,477,734.03/28,553.72
  6. Step 6: Final answer
    x = 17,877.80

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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.