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Finding the Fourth Proportional to 30,042.78, 45,066.48 and 8,981.35

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Solution

The fourth proportional to 30,042.78, 45,066.48 and 8,981.35 is: 13,472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,042.78 : 45,066.48 = 8,981.35 : x
  2. Step 2: Convert to fraction form
    30,042.78/45,066.48 = 8,981.35/x
  3. Step 3: Cross multiply
    30,042.78x = 45,066.48 × 8,981.35
  4. Step 4: Simplify right side
    30,042.78x = 404,757,830.15
  5. Step 5: Solve for x
    x = 404,757,830.15/30,042.78
  6. Step 6: Final answer
    x = 13,472.72

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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.