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Finding the Fourth Proportional to 18,109,455.20, 24,978,384.84 and 12,298,139.36

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Solution

The fourth proportional to 18,109,455.20, 24,978,384.84 and 12,298,139.36 is: 16,962,832.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109,455.20 : 24,978,384.84 = 12,298,139.36 : x
  2. Step 2: Convert to fraction form
    18,109,455.20/24,978,384.84 = 12,298,139.36/x
  3. Step 3: Cross multiply
    18,109,455.20x = 24,978,384.84 × 12,298,139.36
  4. Step 4: Simplify right side
    18,109,455.20x = 307,187,657,750,031.31
  5. Step 5: Solve for x
    x = 307,187,657,750,031.31/18,109,455.20
  6. Step 6: Final answer
    x = 16,962,832.64

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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.