Home / 18,913.09-28,361.44-6,429.77

Finding the Fourth Proportional to 18,913.09, 28,361.44 and 6,429.77

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Solution

The fourth proportional to 18,913.09, 28,361.44 and 6,429.77 is: 9,641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.09 : 28,361.44 = 6,429.77 : x
  2. Step 2: Convert to fraction form
    18,913.09/28,361.44 = 6,429.77/x
  3. Step 3: Cross multiply
    18,913.09x = 28,361.44 × 6,429.77
  4. Step 4: Simplify right side
    18,913.09x = 182,357,362.11
  5. Step 5: Solve for x
    x = 182,357,362.11/18,913.09
  6. Step 6: Final answer
    x = 9,641.86

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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.