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Finding the Fourth Proportional to 18,012,878.30, 27,020,978.45 and 5,882,405.32

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Solution

The fourth proportional to 18,012,878.30, 27,020,978.45 and 5,882,405.32 is: 8,824,150.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012,878.30 : 27,020,978.45 = 5,882,405.32 : x
  2. Step 2: Convert to fraction form
    18,012,878.30/27,020,978.45 = 5,882,405.32/x
  3. Step 3: Cross multiply
    18,012,878.30x = 27,020,978.45 × 5,882,405.32
  4. Step 4: Simplify right side
    18,012,878.30x = 158,948,347,488,302.38
  5. Step 5: Solve for x
    x = 158,948,347,488,302.38/18,012,878.30
  6. Step 6: Final answer
    x = 8,824,150.41

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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.