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Finding the Fourth Proportional to 20,804,927.30, 31,207,390.95 and 18,285,503.30

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Solution

The fourth proportional to 20,804,927.30, 31,207,390.95 and 18,285,503.30 is: 27,428,254.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804,927.30 : 31,207,390.95 = 18,285,503.30 : x
  2. Step 2: Convert to fraction form
    20,804,927.30/31,207,390.95 = 18,285,503.30/x
  3. Step 3: Cross multiply
    20,804,927.30x = 31,207,390.95 × 18,285,503.30
  4. Step 4: Simplify right side
    20,804,927.30x = 570,642,850,200,615.12
  5. Step 5: Solve for x
    x = 570,642,850,200,615.12/20,804,927.30
  6. Step 6: Final answer
    x = 27,428,254.95

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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.