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Finding the Fourth Proportional to 34,719.90, 47,912.90 and 18,804.21

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Solution

The fourth proportional to 34,719.90, 47,912.90 and 18,804.21 is: 25,949.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,719.90 : 47,912.90 = 18,804.21 : x
  2. Step 2: Convert to fraction form
    34,719.90/47,912.90 = 18,804.21/x
  3. Step 3: Cross multiply
    34,719.90x = 47,912.90 × 18,804.21
  4. Step 4: Simplify right side
    34,719.90x = 900,964,139.29
  5. Step 5: Solve for x
    x = 900,964,139.29/34,719.90
  6. Step 6: Final answer
    x = 25,949.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.