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Finding the Fourth Proportional to 28,112.66, 38,791.72 and 18,054.72

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Solution

The fourth proportional to 28,112.66, 38,791.72 and 18,054.72 is: 24,913.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.66 : 38,791.72 = 18,054.72 : x
  2. Step 2: Convert to fraction form
    28,112.66/38,791.72 = 18,054.72/x
  3. Step 3: Cross multiply
    28,112.66x = 38,791.72 × 18,054.72
  4. Step 4: Simplify right side
    28,112.66x = 700,373,799.98
  5. Step 5: Solve for x
    x = 700,373,799.98/28,112.66
  6. Step 6: Final answer
    x = 24,913.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.