Home / 20,991.64-28,968.68-11,560.44

Finding the Fourth Proportional to 20,991.64, 28,968.68 and 11,560.44

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Solution

The fourth proportional to 20,991.64, 28,968.68 and 11,560.44 is: 15,953.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.64 : 28,968.68 = 11,560.44 : x
  2. Step 2: Convert to fraction form
    20,991.64/28,968.68 = 11,560.44/x
  3. Step 3: Cross multiply
    20,991.64x = 28,968.68 × 11,560.44
  4. Step 4: Simplify right side
    20,991.64x = 334,890,687.02
  5. Step 5: Solve for x
    x = 334,890,687.02/20,991.64
  6. Step 6: Final answer
    x = 15,953.53

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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.