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Finding the Fourth Proportional to 10,514.78, 15,782.70 and 7,556.70

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Solution

The fourth proportional to 10,514.78, 15,782.70 and 7,556.70 is: 11,342.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,514.78 : 15,782.70 = 7,556.70 : x
  2. Step 2: Convert to fraction form
    10,514.78/15,782.70 = 7,556.70/x
  3. Step 3: Cross multiply
    10,514.78x = 15,782.70 × 7,556.70
  4. Step 4: Simplify right side
    10,514.78x = 119,265,129.09
  5. Step 5: Solve for x
    x = 119,265,129.09/10,514.78
  6. Step 6: Final answer
    x = 11,342.62

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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.