Home / 20,820,784.60-31,185,691.62-8,653,357.72

Finding the Fourth Proportional to 20,820,784.60, 31,185,691.62 and 8,653,357.72

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Solution

The fourth proportional to 20,820,784.60, 31,185,691.62 and 8,653,357.72 is: 12,961,132.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820,784.60 : 31,185,691.62 = 8,653,357.72 : x
  2. Step 2: Convert to fraction form
    20,820,784.60/31,185,691.62 = 8,653,357.72/x
  3. Step 3: Cross multiply
    20,820,784.60x = 31,185,691.62 × 8,653,357.72
  4. Step 4: Simplify right side
    20,820,784.60x = 269,860,945,333,466.34
  5. Step 5: Solve for x
    x = 269,860,945,333,466.34/20,820,784.60
  6. Step 6: Final answer
    x = 12,961,132.37

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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.