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Finding the Fourth Proportional to 30,687.72, 45,995.74 and 14,028.52

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Solution

The fourth proportional to 30,687.72, 45,995.74 and 14,028.52 is: 21,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,687.72 : 45,995.74 = 14,028.52 : x
  2. Step 2: Convert to fraction form
    30,687.72/45,995.74 = 14,028.52/x
  3. Step 3: Cross multiply
    30,687.72x = 45,995.74 × 14,028.52
  4. Step 4: Simplify right side
    30,687.72x = 645,252,158.50
  5. Step 5: Solve for x
    x = 645,252,158.50/30,687.72
  6. Step 6: Final answer
    x = 21,026.40

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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.