Home / 28,921,817.92-39,875,793.90-21,173,408.20

Finding the Fourth Proportional to 28,921,817.92, 39,875,793.90 and 21,173,408.20

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Solution

The fourth proportional to 28,921,817.92, 39,875,793.90 and 21,173,408.20 is: 29,192,717.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921,817.92 : 39,875,793.90 = 21,173,408.20 : x
  2. Step 2: Convert to fraction form
    28,921,817.92/39,875,793.90 = 21,173,408.20/x
  3. Step 3: Cross multiply
    28,921,817.92x = 39,875,793.90 × 21,173,408.20
  4. Step 4: Simplify right side
    28,921,817.92x = 844,306,461,543,769.88
  5. Step 5: Solve for x
    x = 844,306,461,543,769.88/28,921,817.92
  6. Step 6: Final answer
    x = 29,192,717.55

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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.