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Finding the Fourth Proportional to 30,068.96, 45,079.14 and 12,551.90

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Solution

The fourth proportional to 30,068.96, 45,079.14 and 12,551.90 is: 18,817.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,068.96 : 45,079.14 = 12,551.90 : x
  2. Step 2: Convert to fraction form
    30,068.96/45,079.14 = 12,551.90/x
  3. Step 3: Cross multiply
    30,068.96x = 45,079.14 × 12,551.90
  4. Step 4: Simplify right side
    30,068.96x = 565,828,857.37
  5. Step 5: Solve for x
    x = 565,828,857.37/30,068.96
  6. Step 6: Final answer
    x = 18,817.71

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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.