Home / 20,786,658.20-31,179,987.30-13,133,907.80

Finding the Fourth Proportional to 20,786,658.20, 31,179,987.30 and 13,133,907.80

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Solution

The fourth proportional to 20,786,658.20, 31,179,987.30 and 13,133,907.80 is: 19,700,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786,658.20 : 31,179,987.30 = 13,133,907.80 : x
  2. Step 2: Convert to fraction form
    20,786,658.20/31,179,987.30 = 13,133,907.80/x
  3. Step 3: Cross multiply
    20,786,658.20x = 31,179,987.30 × 13,133,907.80
  4. Step 4: Simplify right side
    20,786,658.20x = 409,515,078,403,371
  5. Step 5: Solve for x
    x = 409,515,078,403,371/20,786,658.20
  6. Step 6: Final answer
    x = 19,700,861.70

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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.