Home / 20,972.40-28,940.31-11,541.57

Finding the Fourth Proportional to 20,972.40, 28,940.31 and 11,541.57

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Solution

The fourth proportional to 20,972.40, 28,940.31 and 11,541.57 is: 15,926.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.40 : 28,940.31 = 11,541.57 : x
  2. Step 2: Convert to fraction form
    20,972.40/28,940.31 = 11,541.57/x
  3. Step 3: Cross multiply
    20,972.40x = 28,940.31 × 11,541.57
  4. Step 4: Simplify right side
    20,972.40x = 334,016,613.69
  5. Step 5: Solve for x
    x = 334,016,613.69/20,972.40
  6. Step 6: Final answer
    x = 15,926.48

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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.