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Finding the Fourth Proportional to 28,045.76, 42,067.72 and 11,400.88

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Solution

The fourth proportional to 28,045.76, 42,067.72 and 11,400.88 is: 17,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,045.76 : 42,067.72 = 11,400.88 : x
  2. Step 2: Convert to fraction form
    28,045.76/42,067.72 = 11,400.88/x
  3. Step 3: Cross multiply
    28,045.76x = 42,067.72 × 11,400.88
  4. Step 4: Simplify right side
    28,045.76x = 479,609,027.59
  5. Step 5: Solve for x
    x = 479,609,027.59/28,045.76
  6. Step 6: Final answer
    x = 17,100.95

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1.5x scale

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.