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Finding the Fourth Proportional to 18,339,968.80, 27,509,953.20 and 10,687,218.40

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Solution

The fourth proportional to 18,339,968.80, 27,509,953.20 and 10,687,218.40 is: 16,030,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339,968.80 : 27,509,953.20 = 10,687,218.40 : x
  2. Step 2: Convert to fraction form
    18,339,968.80/27,509,953.20 = 10,687,218.40/x
  3. Step 3: Cross multiply
    18,339,968.80x = 27,509,953.20 × 10,687,218.40
  4. Step 4: Simplify right side
    18,339,968.80x = 294,004,878,022,178.88
  5. Step 5: Solve for x
    x = 294,004,878,022,178.88/18,339,968.80
  6. Step 6: Final answer
    x = 16,030,827.60

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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.