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Finding the Fourth Proportional to 14,527.28, 21,791.64 and 8,721.20

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Solution

The fourth proportional to 14,527.28, 21,791.64 and 8,721.20 is: 13,082.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,527.28 : 21,791.64 = 8,721.20 : x
  2. Step 2: Convert to fraction form
    14,527.28/21,791.64 = 8,721.20/x
  3. Step 3: Cross multiply
    14,527.28x = 21,791.64 × 8,721.20
  4. Step 4: Simplify right side
    14,527.28x = 190,049,250.77
  5. Step 5: Solve for x
    x = 190,049,250.77/14,527.28
  6. Step 6: Final answer
    x = 13,082.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.