Home / 20,860.92-28,772.82-15,197.40

Finding the Fourth Proportional to 20,860.92, 28,772.82 and 15,197.40

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Solution

The fourth proportional to 20,860.92, 28,772.82 and 15,197.40 is: 20,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.92 : 28,772.82 = 15,197.40 : x
  2. Step 2: Convert to fraction form
    20,860.92/28,772.82 = 15,197.40/x
  3. Step 3: Cross multiply
    20,860.92x = 28,772.82 × 15,197.40
  4. Step 4: Simplify right side
    20,860.92x = 437,272,054.67
  5. Step 5: Solve for x
    x = 437,272,054.67/20,860.92
  6. Step 6: Final answer
    x = 20,961.30

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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.