Home / 20,972.28-28,942.32-11,541.42

Finding the Fourth Proportional to 20,972.28, 28,942.32 and 11,541.42

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Solution

The fourth proportional to 20,972.28, 28,942.32 and 11,541.42 is: 15,927.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.28 : 28,942.32 = 11,541.42 : x
  2. Step 2: Convert to fraction form
    20,972.28/28,942.32 = 11,541.42/x
  3. Step 3: Cross multiply
    20,972.28x = 28,942.32 × 11,541.42
  4. Step 4: Simplify right side
    20,972.28x = 334,035,470.89
  5. Step 5: Solve for x
    x = 334,035,470.89/20,972.28
  6. Step 6: Final answer
    x = 15,927.48

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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.