Home / 28,663.68-39,556.18-15,917.12

Finding the Fourth Proportional to 28,663.68, 39,556.18 and 15,917.12

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Solution

The fourth proportional to 28,663.68, 39,556.18 and 15,917.12 is: 21,965.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.68 : 39,556.18 = 15,917.12 : x
  2. Step 2: Convert to fraction form
    28,663.68/39,556.18 = 15,917.12/x
  3. Step 3: Cross multiply
    28,663.68x = 39,556.18 × 15,917.12
  4. Step 4: Simplify right side
    28,663.68x = 629,620,463.80
  5. Step 5: Solve for x
    x = 629,620,463.80/28,663.68
  6. Step 6: Final answer
    x = 21,965.79

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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.