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Finding the Fourth Proportional to 14,043.32, 21,048.78 and 5,272.64

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Solution

The fourth proportional to 14,043.32, 21,048.78 and 5,272.64 is: 7,902.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,043.32 : 21,048.78 = 5,272.64 : x
  2. Step 2: Convert to fraction form
    14,043.32/21,048.78 = 5,272.64/x
  3. Step 3: Cross multiply
    14,043.32x = 21,048.78 × 5,272.64
  4. Step 4: Simplify right side
    14,043.32x = 110,982,639.38
  5. Step 5: Solve for x
    x = 110,982,639.38/14,043.32
  6. Step 6: Final answer
    x = 7,902.88

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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.