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Finding the Fourth Proportional to 18,380,013.30, 27,578,877.30 and 12,977,029.80

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Solution

The fourth proportional to 18,380,013.30, 27,578,877.30 and 12,977,029.80 is: 19,471,798.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,380,013.30 : 27,578,877.30 = 12,977,029.80 : x
  2. Step 2: Convert to fraction form
    18,380,013.30/27,578,877.30 = 12,977,029.80/x
  3. Step 3: Cross multiply
    18,380,013.30x = 27,578,877.30 × 12,977,029.80
  4. Step 4: Simplify right side
    18,380,013.30x = 357,891,912,572,643.56
  5. Step 5: Solve for x
    x = 357,891,912,572,643.56/18,380,013.30
  6. Step 6: Final answer
    x = 19,471,798.35

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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.