Home / 20,972.28-28,941.74-11,540.84

Finding the Fourth Proportional to 20,972.28, 28,941.74 and 11,540.84

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Solution

The fourth proportional to 20,972.28, 28,941.74 and 11,540.84 is: 15,926.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.28 : 28,941.74 = 11,540.84 : x
  2. Step 2: Convert to fraction form
    20,972.28/28,941.74 = 11,540.84/x
  3. Step 3: Cross multiply
    20,972.28x = 28,941.74 × 11,540.84
  4. Step 4: Simplify right side
    20,972.28x = 334,011,990.66
  5. Step 5: Solve for x
    x = 334,011,990.66/20,972.28
  6. Step 6: Final answer
    x = 15,926.36

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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.