Home / 12,780.44-17,636.87-7,115.10

Finding the Fourth Proportional to 12,780.44, 17,636.87 and 7,115.10

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Solution

The fourth proportional to 12,780.44, 17,636.87 and 7,115.10 is: 9,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.44 : 17,636.87 = 7,115.10 : x
  2. Step 2: Convert to fraction form
    12,780.44/17,636.87 = 7,115.10/x
  3. Step 3: Cross multiply
    12,780.44x = 17,636.87 × 7,115.10
  4. Step 4: Simplify right side
    12,780.44x = 125,488,093.74
  5. Step 5: Solve for x
    x = 125,488,093.74/12,780.44
  6. Step 6: Final answer
    x = 9,818.76

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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.