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Finding the Fourth Proportional to 10,375.90, 15,556.29 and 7,078.66

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Solution

The fourth proportional to 10,375.90, 15,556.29 and 7,078.66 is: 10,612.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,375.90 : 15,556.29 = 7,078.66 : x
  2. Step 2: Convert to fraction form
    10,375.90/15,556.29 = 7,078.66/x
  3. Step 3: Cross multiply
    10,375.90x = 15,556.29 × 7,078.66
  4. Step 4: Simplify right side
    10,375.90x = 110,117,687.77
  5. Step 5: Solve for x
    x = 110,117,687.77/10,375.90
  6. Step 6: Final answer
    x = 10,612.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.