Home / 20,968.72-28,943.96-13,015.60

Finding the Fourth Proportional to 20,968.72, 28,943.96 and 13,015.60

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Solution

The fourth proportional to 20,968.72, 28,943.96 and 13,015.60 is: 17,965.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.72 : 28,943.96 = 13,015.60 : x
  2. Step 2: Convert to fraction form
    20,968.72/28,943.96 = 13,015.60/x
  3. Step 3: Cross multiply
    20,968.72x = 28,943.96 × 13,015.60
  4. Step 4: Simplify right side
    20,968.72x = 376,723,005.78
  5. Step 5: Solve for x
    x = 376,723,005.78/20,968.72
  6. Step 6: Final answer
    x = 17,965.95

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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.