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Finding the Fourth Proportional to 13,361,806.20, 20,042,709.30 and 9,960,583.80

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Solution

The fourth proportional to 13,361,806.20, 20,042,709.30 and 9,960,583.80 is: 14,940,875.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361,806.20 : 20,042,709.30 = 9,960,583.80 : x
  2. Step 2: Convert to fraction form
    13,361,806.20/20,042,709.30 = 9,960,583.80/x
  3. Step 3: Cross multiply
    13,361,806.20x = 20,042,709.30 × 9,960,583.80
  4. Step 4: Simplify right side
    13,361,806.20x = 199,637,085,561,689.38
  5. Step 5: Solve for x
    x = 199,637,085,561,689.38/13,361,806.20
  6. Step 6: Final answer
    x = 14,940,875.70

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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.