Home / 21,791.15-30,035.85-15,409.51

Finding the Fourth Proportional to 21,791.15, 30,035.85 and 15,409.51

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Solution

The fourth proportional to 21,791.15, 30,035.85 and 15,409.51 is: 21,239.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.15 : 30,035.85 = 15,409.51 : x
  2. Step 2: Convert to fraction form
    21,791.15/30,035.85 = 15,409.51/x
  3. Step 3: Cross multiply
    21,791.15x = 30,035.85 × 15,409.51
  4. Step 4: Simplify right side
    21,791.15x = 462,837,730.93
  5. Step 5: Solve for x
    x = 462,837,730.93/21,791.15
  6. Step 6: Final answer
    x = 21,239.71

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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.