Home / 20,972.64-28,942.86-11,541.78

Finding the Fourth Proportional to 20,972.64, 28,942.86 and 11,541.78

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Solution

The fourth proportional to 20,972.64, 28,942.86 and 11,541.78 is: 15,928.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.64 : 28,942.86 = 11,541.78 : x
  2. Step 2: Convert to fraction form
    20,972.64/28,942.86 = 11,541.78/x
  3. Step 3: Cross multiply
    20,972.64x = 28,942.86 × 11,541.78
  4. Step 4: Simplify right side
    20,972.64x = 334,052,122.69
  5. Step 5: Solve for x
    x = 334,052,122.69/20,972.64
  6. Step 6: Final answer
    x = 15,928.00

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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.