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Finding the Fourth Proportional to 18,878.10, 26,049.50 and 10,378.82

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Solution

The fourth proportional to 18,878.10, 26,049.50 and 10,378.82 is: 14,321.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.10 : 26,049.50 = 10,378.82 : x
  2. Step 2: Convert to fraction form
    18,878.10/26,049.50 = 10,378.82/x
  3. Step 3: Cross multiply
    18,878.10x = 26,049.50 × 10,378.82
  4. Step 4: Simplify right side
    18,878.10x = 270,363,071.59
  5. Step 5: Solve for x
    x = 270,363,071.59/18,878.10
  6. Step 6: Final answer
    x = 14,321.52

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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.