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Finding the Fourth Proportional to 18,767,998.80, 28,116,568.80 and 9,639,023.40

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Solution

The fourth proportional to 18,767,998.80, 28,116,568.80 and 9,639,023.40 is: 14,440,338.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,767,998.80 : 28,116,568.80 = 9,639,023.40 : x
  2. Step 2: Convert to fraction form
    18,767,998.80/28,116,568.80 = 9,639,023.40/x
  3. Step 3: Cross multiply
    18,767,998.80x = 28,116,568.80 × 9,639,023.40
  4. Step 4: Simplify right side
    18,767,998.80x = 271,016,264,590,909.94
  5. Step 5: Solve for x
    x = 271,016,264,590,909.94/18,767,998.80
  6. Step 6: Final answer
    x = 14,440,338.98

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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.