Home / 21,018,511.20-31,521,861.90-6,645,984.60

Finding the Fourth Proportional to 21,018,511.20, 31,521,861.90 and 6,645,984.60

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Solution

The fourth proportional to 21,018,511.20, 31,521,861.90 and 6,645,984.60 is: 9,967,109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018,511.20 : 31,521,861.90 = 6,645,984.60 : x
  2. Step 2: Convert to fraction form
    21,018,511.20/31,521,861.90 = 6,645,984.60/x
  3. Step 3: Cross multiply
    21,018,511.20x = 31,521,861.90 × 6,645,984.60
  4. Step 4: Simplify right side
    21,018,511.20x = 209,493,808,750,726.72
  5. Step 5: Solve for x
    x = 209,493,808,750,726.72/21,018,511.20
  6. Step 6: Final answer
    x = 9,967,109.79

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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.