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Finding the Fourth Proportional to 26,700.99, 39,978.51 and 19,212.04

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Solution

The fourth proportional to 26,700.99, 39,978.51 and 19,212.04 is: 28,765.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,700.99 : 39,978.51 = 19,212.04 : x
  2. Step 2: Convert to fraction form
    26,700.99/39,978.51 = 19,212.04/x
  3. Step 3: Cross multiply
    26,700.99x = 39,978.51 × 19,212.04
  4. Step 4: Simplify right side
    26,700.99x = 768,068,594.38
  5. Step 5: Solve for x
    x = 768,068,594.38/26,700.99
  6. Step 6: Final answer
    x = 28,765.55

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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.