Home / 20,968.61-28,949.00-13,015.22

Finding the Fourth Proportional to 20,968.61, 28,949.00 and 13,015.22

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Solution

The fourth proportional to 20,968.61, 28,949.00 and 13,015.22 is: 17,968.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.61 : 28,949.00 = 13,015.22 : x
  2. Step 2: Convert to fraction form
    20,968.61/28,949.00 = 13,015.22/x
  3. Step 3: Cross multiply
    20,968.61x = 28,949.00 × 13,015.22
  4. Step 4: Simplify right side
    20,968.61x = 376,777,393.96
  5. Step 5: Solve for x
    x = 376,777,393.96/20,968.61
  6. Step 6: Final answer
    x = 17,968.64

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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.