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Finding the Fourth Proportional to 18,811,706.76, 28,169,697.78 and 12,402,513.72

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Solution

The fourth proportional to 18,811,706.76, 28,169,697.78 and 12,402,513.72 is: 18,572,215.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811,706.76 : 28,169,697.78 = 12,402,513.72 : x
  2. Step 2: Convert to fraction form
    18,811,706.76/28,169,697.78 = 12,402,513.72/x
  3. Step 3: Cross multiply
    18,811,706.76x = 28,169,697.78 × 12,402,513.72
  4. Step 4: Simplify right side
    18,811,706.76x = 349,375,063,204,703.56
  5. Step 5: Solve for x
    x = 349,375,063,204,703.56/18,811,706.76
  6. Step 6: Final answer
    x = 18,572,215.04

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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.