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Finding the Fourth Proportional to 22,461.66, 30,996 and 12,390.66

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Solution

The fourth proportional to 22,461.66, 30,996 and 12,390.66 is: 17,098.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,461.66 : 30,996 = 12,390.66 : x
  2. Step 2: Convert to fraction form
    22,461.66/30,996 = 12,390.66/x
  3. Step 3: Cross multiply
    22,461.66x = 30,996 × 12,390.66
  4. Step 4: Simplify right side
    22,461.66x = 384,060,897.36
  5. Step 5: Solve for x
    x = 384,060,897.36/22,461.66
  6. Step 6: Final answer
    x = 17,098.51

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Why These Related Problems?

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