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Finding the Fourth Proportional to 18,850.88, 26,042.16 and 12,405.71

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Solution

The fourth proportional to 18,850.88, 26,042.16 and 12,405.71 is: 17,138.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.88 : 26,042.16 = 12,405.71 : x
  2. Step 2: Convert to fraction form
    18,850.88/26,042.16 = 12,405.71/x
  3. Step 3: Cross multiply
    18,850.88x = 26,042.16 × 12,405.71
  4. Step 4: Simplify right side
    18,850.88x = 323,071,354.52
  5. Step 5: Solve for x
    x = 323,071,354.52/18,850.88
  6. Step 6: Final answer
    x = 17,138.27

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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.