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Finding the Fourth Proportional to 13,869.95, 20,804.39 and 7,642.31

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Solution

The fourth proportional to 13,869.95, 20,804.39 and 7,642.31 is: 11,463.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.95 : 20,804.39 = 7,642.31 : x
  2. Step 2: Convert to fraction form
    13,869.95/20,804.39 = 7,642.31/x
  3. Step 3: Cross multiply
    13,869.95x = 20,804.39 × 7,642.31
  4. Step 4: Simplify right side
    13,869.95x = 158,993,611.54
  5. Step 5: Solve for x
    x = 158,993,611.54/13,869.95
  6. Step 6: Final answer
    x = 11,463.17

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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.