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Finding the Fourth Proportional to 10,881.80, 15,018.10 and 6,406.66

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Solution

The fourth proportional to 10,881.80, 15,018.10 and 6,406.66 is: 8,841.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.80 : 15,018.10 = 6,406.66 : x
  2. Step 2: Convert to fraction form
    10,881.80/15,018.10 = 6,406.66/x
  3. Step 3: Cross multiply
    10,881.80x = 15,018.10 × 6,406.66
  4. Step 4: Simplify right side
    10,881.80x = 96,215,860.55
  5. Step 5: Solve for x
    x = 96,215,860.55/10,881.80
  6. Step 6: Final answer
    x = 8,841.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.