Home / 20,679,538.20-28,519,184.88-12,945,285.60

Finding the Fourth Proportional to 20,679,538.20, 28,519,184.88 and 12,945,285.60

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Solution

The fourth proportional to 20,679,538.20, 28,519,184.88 and 12,945,285.60 is: 17,852,864.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679,538.20 : 28,519,184.88 = 12,945,285.60 : x
  2. Step 2: Convert to fraction form
    20,679,538.20/28,519,184.88 = 12,945,285.60/x
  3. Step 3: Cross multiply
    20,679,538.20x = 28,519,184.88 × 12,945,285.60
  4. Step 4: Simplify right side
    20,679,538.20x = 369,188,993,350,801.69
  5. Step 5: Solve for x
    x = 369,188,993,350,801.69/20,679,538.20
  6. Step 6: Final answer
    x = 17,852,864.50

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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.