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Finding the Fourth Proportional to 13,753,516.40, 18,978,740.88 and 7,952,674.40

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Solution

The fourth proportional to 13,753,516.40, 18,978,740.88 and 7,952,674.40 is: 10,974,047.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753,516.40 : 18,978,740.88 = 7,952,674.40 : x
  2. Step 2: Convert to fraction form
    13,753,516.40/18,978,740.88 = 7,952,674.40/x
  3. Step 3: Cross multiply
    13,753,516.40x = 18,978,740.88 × 7,952,674.40
  4. Step 4: Simplify right side
    13,753,516.40x = 150,931,746,740,609.47
  5. Step 5: Solve for x
    x = 150,931,746,740,609.47/13,753,516.40
  6. Step 6: Final answer
    x = 10,974,047.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.