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Finding the Fourth Proportional to 11,458.95, 15,791.94 and 8,937.09

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Solution

The fourth proportional to 11,458.95, 15,791.94 and 8,937.09 is: 12,316.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,458.95 : 15,791.94 = 8,937.09 : x
  2. Step 2: Convert to fraction form
    11,458.95/15,791.94 = 8,937.09/x
  3. Step 3: Cross multiply
    11,458.95x = 15,791.94 × 8,937.09
  4. Step 4: Simplify right side
    11,458.95x = 141,133,989.05
  5. Step 5: Solve for x
    x = 141,133,989.05/11,458.95
  6. Step 6: Final answer
    x = 12,316.49

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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.