Home / 20,743.77-28,650.31-15,103.74

Finding the Fourth Proportional to 20,743.77, 28,650.31 and 15,103.74

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Solution

The fourth proportional to 20,743.77, 28,650.31 and 15,103.74 is: 20,860.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.77 : 28,650.31 = 15,103.74 : x
  2. Step 2: Convert to fraction form
    20,743.77/28,650.31 = 15,103.74/x
  3. Step 3: Cross multiply
    20,743.77x = 28,650.31 × 15,103.74
  4. Step 4: Simplify right side
    20,743.77x = 432,726,822.26
  5. Step 5: Solve for x
    x = 432,726,822.26/20,743.77
  6. Step 6: Final answer
    x = 20,860.57

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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.