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Finding the Fourth Proportional to 14,369.56, 21,551.88 and 3,978.88

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Solution

The fourth proportional to 14,369.56, 21,551.88 and 3,978.88 is: 5,967.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,369.56 : 21,551.88 = 3,978.88 : x
  2. Step 2: Convert to fraction form
    14,369.56/21,551.88 = 3,978.88/x
  3. Step 3: Cross multiply
    14,369.56x = 21,551.88 × 3,978.88
  4. Step 4: Simplify right side
    14,369.56x = 85,752,344.29
  5. Step 5: Solve for x
    x = 85,752,344.29/14,369.56
  6. Step 6: Final answer
    x = 5,967.64

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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.