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Finding the Fourth Proportional to 30,066.78, 45,061.13 and 12,276.62

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Solution

The fourth proportional to 30,066.78, 45,061.13 and 12,276.62 is: 18,398.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,066.78 : 45,061.13 = 12,276.62 : x
  2. Step 2: Convert to fraction form
    30,066.78/45,061.13 = 12,276.62/x
  3. Step 3: Cross multiply
    30,066.78x = 45,061.13 × 12,276.62
  4. Step 4: Simplify right side
    30,066.78x = 553,198,083.09
  5. Step 5: Solve for x
    x = 553,198,083.09/30,066.78
  6. Step 6: Final answer
    x = 18,398.98

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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.