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Finding the Fourth Proportional to 18,914.76, 26,108.66 and 12,963.69

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Solution

The fourth proportional to 18,914.76, 26,108.66 and 12,963.69 is: 17,894.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.76 : 26,108.66 = 12,963.69 : x
  2. Step 2: Convert to fraction form
    18,914.76/26,108.66 = 12,963.69/x
  3. Step 3: Cross multiply
    18,914.76x = 26,108.66 × 12,963.69
  4. Step 4: Simplify right side
    18,914.76x = 338,464,606.96
  5. Step 5: Solve for x
    x = 338,464,606.96/18,914.76
  6. Step 6: Final answer
    x = 17,894.21

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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.