Home / 18,905.98-28,334.31-7,799.98

Finding the Fourth Proportional to 18,905.98, 28,334.31 and 7,799.98

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Solution

The fourth proportional to 18,905.98, 28,334.31 and 7,799.98 is: 11,689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.98 : 28,334.31 = 7,799.98 : x
  2. Step 2: Convert to fraction form
    18,905.98/28,334.31 = 7,799.98/x
  3. Step 3: Cross multiply
    18,905.98x = 28,334.31 × 7,799.98
  4. Step 4: Simplify right side
    18,905.98x = 221,007,051.31
  5. Step 5: Solve for x
    x = 221,007,051.31/18,905.98
  6. Step 6: Final answer
    x = 11,689.80

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1.5x scale

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.