Home / 20,860.74-28,790.24-11,909.53

Finding the Fourth Proportional to 20,860.74, 28,790.24 and 11,909.53

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Solution

The fourth proportional to 20,860.74, 28,790.24 and 11,909.53 is: 16,436.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.74 : 28,790.24 = 11,909.53 : x
  2. Step 2: Convert to fraction form
    20,860.74/28,790.24 = 11,909.53/x
  3. Step 3: Cross multiply
    20,860.74x = 28,790.24 × 11,909.53
  4. Step 4: Simplify right side
    20,860.74x = 342,878,203.43
  5. Step 5: Solve for x
    x = 342,878,203.43/20,860.74
  6. Step 6: Final answer
    x = 16,436.53

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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.