Home / 20,515,435.20-30,748,269.60-9,143,812.80

Finding the Fourth Proportional to 20,515,435.20, 30,748,269.60 and 9,143,812.80

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Solution

The fourth proportional to 20,515,435.20, 30,748,269.60 and 9,143,812.80 is: 13,704,628.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515,435.20 : 30,748,269.60 = 9,143,812.80 : x
  2. Step 2: Convert to fraction form
    20,515,435.20/30,748,269.60 = 9,143,812.80/x
  3. Step 3: Cross multiply
    20,515,435.20x = 30,748,269.60 × 9,143,812.80
  4. Step 4: Simplify right side
    20,515,435.20x = 281,156,421,146,330.91
  5. Step 5: Solve for x
    x = 281,156,421,146,330.91/20,515,435.20
  6. Step 6: Final answer
    x = 13,704,628.66

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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.