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Finding the Fourth Proportional to 18,608.91, 25,678.94 and 12,310.35

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Solution

The fourth proportional to 18,608.91, 25,678.94 and 12,310.35 is: 16,987.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.91 : 25,678.94 = 12,310.35 : x
  2. Step 2: Convert to fraction form
    18,608.91/25,678.94 = 12,310.35/x
  3. Step 3: Cross multiply
    18,608.91x = 25,678.94 × 12,310.35
  4. Step 4: Simplify right side
    18,608.91x = 316,116,677.48
  5. Step 5: Solve for x
    x = 316,116,677.48/18,608.91
  6. Step 6: Final answer
    x = 16,987.38

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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.