Home / 28,228.94-42,359.81-12,646.56

Finding the Fourth Proportional to 28,228.94, 42,359.81 and 12,646.56

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Solution

The fourth proportional to 28,228.94, 42,359.81 and 12,646.56 is: 18,977.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.94 : 42,359.81 = 12,646.56 : x
  2. Step 2: Convert to fraction form
    28,228.94/42,359.81 = 12,646.56/x
  3. Step 3: Cross multiply
    28,228.94x = 42,359.81 × 12,646.56
  4. Step 4: Simplify right side
    28,228.94x = 535,705,815.52
  5. Step 5: Solve for x
    x = 535,705,815.52/28,228.94
  6. Step 6: Final answer
    x = 18,977.19

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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.