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Finding the Fourth Proportional to 18,970.69, 26,175.49 and 11,008.64

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Solution

The fourth proportional to 18,970.69, 26,175.49 and 11,008.64 is: 15,189.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.69 : 26,175.49 = 11,008.64 : x
  2. Step 2: Convert to fraction form
    18,970.69/26,175.49 = 11,008.64/x
  3. Step 3: Cross multiply
    18,970.69x = 26,175.49 × 11,008.64
  4. Step 4: Simplify right side
    18,970.69x = 288,156,584.15
  5. Step 5: Solve for x
    x = 288,156,584.15/18,970.69
  6. Step 6: Final answer
    x = 15,189.57

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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.