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Finding the Fourth Proportional to 18,651,644.10, 27,977,466.15 and 5,188,472.10

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Solution

The fourth proportional to 18,651,644.10, 27,977,466.15 and 5,188,472.10 is: 7,782,708.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651,644.10 : 27,977,466.15 = 5,188,472.10 : x
  2. Step 2: Convert to fraction form
    18,651,644.10/27,977,466.15 = 5,188,472.10/x
  3. Step 3: Cross multiply
    18,651,644.10x = 27,977,466.15 × 5,188,472.10
  4. Step 4: Simplify right side
    18,651,644.10x = 145,160,302,547,969.41
  5. Step 5: Solve for x
    x = 145,160,302,547,969.41/18,651,644.10
  6. Step 6: Final answer
    x = 7,782,708.15

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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.