Home / 20,615.07-28,431.24-15,846.57

Finding the Fourth Proportional to 20,615.07, 28,431.24 and 15,846.57

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Solution

The fourth proportional to 20,615.07, 28,431.24 and 15,846.57 is: 21,854.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.07 : 28,431.24 = 15,846.57 : x
  2. Step 2: Convert to fraction form
    20,615.07/28,431.24 = 15,846.57/x
  3. Step 3: Cross multiply
    20,615.07x = 28,431.24 × 15,846.57
  4. Step 4: Simplify right side
    20,615.07x = 450,537,634.85
  5. Step 5: Solve for x
    x = 450,537,634.85/20,615.07
  6. Step 6: Final answer
    x = 21,854.77

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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.